WO2004034131A1 - 眼鏡レンズの光学値の決定方法、眼鏡レンズの製造方法、眼鏡レンズ及びその受発注システム - Google Patents
眼鏡レンズの光学値の決定方法、眼鏡レンズの製造方法、眼鏡レンズ及びその受発注システム Download PDFInfo
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- WO2004034131A1 WO2004034131A1 PCT/JP2003/012820 JP0312820W WO2004034131A1 WO 2004034131 A1 WO2004034131 A1 WO 2004034131A1 JP 0312820 W JP0312820 W JP 0312820W WO 2004034131 A1 WO2004034131 A1 WO 2004034131A1
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- Prior art keywords
- lens
- power
- optometry
- wavefront
- spectacle lens
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/1015—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for wavefront analysis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/02—Subjective types, i.e. testing apparatus requiring the active assistance of the patient
- A61B3/028—Subjective types, i.e. testing apparatus requiring the active assistance of the patient for testing visual acuity; for determination of refraction, e.g. phoropters
- A61B3/04—Trial frames; Sets of lenses for use therewith
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C13/00—Assembling; Repairing; Cleaning
- G02C13/003—Measuring during assembly or fitting of spectacles
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/024—Methods of designing ophthalmic lenses
- G02C7/027—Methods of designing ophthalmic lenses considering wearer's parameters
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
- G02C7/061—Spectacle lenses with progressively varying focal power
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
- A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
- A61B3/103—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions for determining refraction, e.g. refractometers, skiascopes
Definitions
- the present invention relates to a method for determining an optical value of an ophthalmic lens, a method for manufacturing an ophthalmic lens, an ophthalmic lens, and an ordering and ordering system for the ophthalmic lens, which can obtain a spectacle lens more suitable for a subject's eye.
- a progressive-power lens there are a far vision area for far vision, a near vision area for near vision, and an intermediate vision area for viewing an intermediate distance.
- positive refractive power is progressively added from the distance portion region to the near portion region through the intermediate vision region.
- the difference between the refractive power of the distance portion and the near portion of the progressive-power lens is called the addition power.
- the added refractive power is specified. Normally, the addition power of a progressive-power lens is specified in a range of 0.25 to 4.00D in increments of 0.25D, depending on the degree of presbyopia and the working distance.
- the ordering information when ordering a progressive power lens from a spectacle store to a spectacle lens manufacturer includes the addition power.
- the refractive power of the progressive refraction lens changes from the far vision region to the near vision region through the intermediate vision region according to the designated addition power. Therefore, progressive refraction
- the size of the image changes depending on the field of view of the lens, and this is perceived by the spectacle wearer as “shaking” or “distortion”.
- the “fluctuation” and “distortion” of this progressive power lens tend to increase as the addition power increases.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-66148
- the addition refractive power of the progressive-power lens is insufficient for the degree of presbyopia of the spectacle wearer, the insufficient accommodation power cannot be sufficiently compensated. Therefore, when the spectacle wearer tries to see a nearby object through the near vision area, if the object is brought close to a required distance, the adjusting power is insufficient, the object is out of focus, and the object appears blurred. Dissatisfied.
- the addition refractive power of the progressive-power lens is excessively applied to the degree of presbyopia of the spectacle wearer, the insufficient accommodation power is excessively supplemented. Therefore, when the spectacle wearer tries to see a nearby object through the near vision area, the object cannot be seen unless the object is brought closer than necessary. Distortion is often felt and dissatisfied. Therefore, it is very important for eyeglasses using progressive-power lenses to provide the appropriate addition power according to the degree of presbyopia of the spectacle wearer. Therefore, when an eyeglass lens is ordered, it is extremely important to perform an appropriate optometry, and eyeglasses are manufactured based on the appropriate prescription values obtained thereby.
- the lens is manufactured on the basis of a presumed suitability value obtained by performing an appropriate optometry. It has been found that the spectacles made may not always be able to say that the “sway” and “distortion” are sufficiently small.
- the present invention relates to a method of determining an optical value of a spectacle lens which enables to minimize "shake” and "distortion” felt when wearing spectacles, a method of manufacturing a spectacle lens, a spectacle lens, and a system for ordering the same.
- the purpose is to provide.
- the present invention as means for solving the above-mentioned problems has been made based on the following clarified results.
- the optical conditions at the time of optometry and the optical conditions at the time of actually wearing the spectacle lens manufactured based on the prescription values obtained by this optometry are not considered equivalent and can be ignored. It turned out to be no degree.
- FIG. 15 is an explanatory diagram of the optometry lens (trial lens, test lens) and the spectacle test frame (temporary frame, trial frame) used in the subjective optometry using the lens exchange method.
- the ophthalmic examination frame has a mounting position for mounting three to four optometry lenses. When multiple optometry lenses are mounted, a weak optometry lens is attached to the outside (object side) and the inside (eye) Attach a strong optometry lens to the side.
- a subjective optometry method using the optometry lens and the eyeglass test frame and a lens exchange method will be described.
- the optometry lens and spectacle test frame should be used to create a prescription condition that allows the patient to view the characters 5 m ahead, for example, so that the patient can comfortably view far away.
- the method of creating this distant prescription state is common to each of the following addition power determination methods, it will not be described in detail here as it is required by a general optometry method.
- the difference in the method of determining the addition power of a progressive-power lens is in the later process after creating this prescription condition for distance use.
- the first method for determining the addition power of the progressive-power lens by actual optometry is shown below.
- This optometry lens is additionally inserted into the optometry lens mounting position outside (object side) of the spectacle test frame in the far prescription state.
- this first method is referred to as “near-vision lens addition method”.
- a second method for determining the addition power of the progressive-power lens will be described below. From a distant state in which an optometry lens with an appropriate power is attached to the spectacle test frame for distant vision, only the spherical power lens of the optometry lens is replaced to allow a patient to have comfortable near vision, for example, 40
- the prescription state for near vision is obtained by selecting the spherical power of the optometry lens so that the character in front of cm can be visually recognized.
- There is a method in which the difference in spherical power between the optometric lens having the spherical power in the near prescription state and the optometric lens having the spherical power in the far prescription state is defined as the addition refractive power.
- this second method is referred to as “distance / near-distance power difference method”.
- a third method for determining the addition power of a progressive-power lens is described below.
- a subjective optometry method based on a lens exchange method using a refractor head There is a method in which a prescription power in the distance and a prescription power in the near area are obtained, and the difference between the spherical powers of the two is used as the addition refractive power.
- use the refractor head of the optometer Since the near vision when using the camera is narrower than when using the eyeglass test frame, the near vision is performed in the same direction as the direction of the far vision. Therefore, since the direction of near vision is different from that of near vision in the distance / near vision lens power difference method using the eyeglass test frame, It is better to distinguish it as "difference method.”
- a fourth method for determining the addition power of a progressive-power lens is described below.
- the optometry lens of the appropriate power for far vision attached to the spectacle test frame, measure the near distance to the limit of how close the patient can see (clearly see).
- the reciprocal is the patient's assistive power. This is based on the idea of how much eyeglass lenses should be used to make adjustments so that the patient can comfortably see the target working distance.
- This auxiliary adjustment power is used as the addition refractive power.
- the fourth method can be performed by using the refractor head of the optometry apparatus, but the far line of sight and the near line of sight are almost the same direction as described above in the third method. Regarding this method and apparatus, the following has been proposed by the present applicant.
- Patent Literature 2 Japanese Patent Application Laid-Open No. 5-1766864
- the configuration of the optometry lens optical system differs in each optometry method. For this reason, the light wavefront that enters the patient's eye when viewing a near object created during optometry differs slightly depending on each optometry method. Also, as described above, the optical system at the time of optometry and the optical system when the spectacles using the manufactured lens are actually worn do not usually match, and these optical conditions are also different. The light wavefront is also different. If the light wavefront entering the eye when wearing spectacles does not match the lightwave front entering the eye at the time of optometry, the same optical performance as that obtained at the time of optometry cannot be obtained.
- the invention of the present application has been made based on the above-described clarified results, and an optical wavefront that enters an eye of an examinee at the time of optometry, and an object in which the examinee wears a spectacle lens while wearing an eyeglass lens.
- the optical value of the spectacle lens is selected and determined so that the light wavefront that enters the eye when looking at the target is close or approximate.
- the light wave front that enters the eye when viewing a near object is calculated, and this light wave front enters the patient's eye at the time of optometry.
- the distant refracting power is determined by the wavefront shape of the rear apex sphere when an infinite ray (plane wavefront) is incident on the optometry lens optical system when the distant power is determined.
- the near refractive power is determined by the wavefront shape of the rear apex spherical surface of the spherical wavefront emitted from the near object in the optometry lens optical system when the near power is determined. In other words, it is only necessary to generate the same wavefront at the time of optometry at the distance and near when the progressive power lens is applied.
- the spectacle store In order to calculate the light wavefront at the time of optometry, information on the optometry lens optical system at the time of optometry is required.
- the spectacle store simply specifies the value of the addition power, and in any way at the time of optometry the addition power It did not include the identification information of the method of determining the addition refractive power in the lens ordering information. For this reason, even if the appropriate addition power is determined by optometry, since the identification information of the method for determining the addition power at the time of optometry is not included in the lens order information, the eyeglass lens manufacturer In other words, sufficient information was not given to give the actual addition lens an appropriate addition power.
- the order information of the progressive power lens communicated from the spectacle store to the spectacle lens maker includes identification information of a method of determining the addition power, which method is used to determine the addition power at the time of optometry. Includes the effective addition power of the lens when manufacturing a progressive-power lens. It is possible to set an appropriate value without shortage.
- the present invention can be applied to a progressive refraction-kasemi-finished lens blank (hereinafter referred to as a progressive refraction-kasemi lens) in which the progressive surface of the first lens surface (the surface on the object side) is completed in advance.
- a progressive-power lens whose first surface (object-side surface) is a progressive surface, it is manufactured by processing this progressive-refractive cascade lens.
- the progressive surface of the first lens of the progressive refraction semi-finished lens is mass-produced in advance as the addition power of the progressive surface based on the increase in surface refractive power in the near vision region based on the surface refractive power in the far vision region. Often.
- the addition refractive power of the progressive surface of the progressive refraction lens is often mass-produced, for example, in a range of 0.75 to 3.50D in increments of 0.25D.
- the wavefront of the transmitted light at the time of optometry is described above for all prescription orders. It is not possible to design the shape of the progressive surface to reproduce.
- the addition refractive power of the progressive surface is selected from the progressive refraction camera lens so that the wavefront closest to the transmitted light wavefront at the time of optometry is obtained. If the surface is processed, a better progressive power lens can be manufactured.
- FIG. 1 is an optical path diagram at the time of optometry of the spectacle lens according to the first embodiment, wherein FIG. 1 (a) is an optical path diagram in a distant viewing direction, and FIG. 1 (b) is an optical path diagram in a near viewing direction. It is.
- Fig. 2 is an interface screen for finding the light wavefront that enters the eyes by performing ray tracing with a computer.
- FIG. 3 shows the astigmatism distribution diagram and the average of the spectacle lens whose optical values have been determined. It is a figure showing a frequency.
- FIG. 4 is an optical path diagram at the time of optometry according to the second embodiment.
- Fig. 5 is an interface screen for finding the light wavefront that enters the eyes by ray tracing with a computer.
- FIG. 6 is a diagram showing an astigmatism distribution diagram and an average power of the spectacle lens whose optical values have been determined.
- FIG. 7 is an optical path diagram at the time of optometry of the spectacle lens according to the third embodiment, wherein FIG. 7 (a) is an optical path diagram in a distant viewing direction, and FIG. 7 (b) is an optical path diagram in a near viewing direction. It is.
- Fig. 8 is an interface screen for finding a light wavefront that enters the eye by tracing rays using a computer.
- FIG. 9 is a diagram showing an astigmatism distribution diagram and an average power of the spectacle lens whose optical values have been determined.
- FIG. 10 is an optical path diagram at the time of optometry of the spectacle lens according to the fourth embodiment.
- Fig. 11 is an interface screen for finding the light wavefront that enters the eye by ray tracing with a computer.
- FIG. 12 is a diagram showing an astigmatism distribution diagram and an average power of the spectacle lens whose optical values have been determined.
- FIG. 13 is a diagram showing a state in which the addition refractive power is measured by applying a lens meter to a progressive surface in front of the progressive-power lens.
- FIG. 14 is a numerical table showing the shape of a standard optometry lens.
- Fig. 15 is an explanatory diagram of the optometry lens (trial lens, test lens) and the spectacle test frame (temporary frame, trial frame) used in the subjective optometry using the lens exchange method.
- FIG. 16 shows the X and Y coordinates of the optometry lens and the eyeball.
- FIG. 17 shows an input / output data table of the first embodiment.
- FIG. 18 is an input / output data table of the second embodiment.
- FIG. 19 is a table showing the input / output data of the third embodiment.
- FIG. 20 is an input / output data table of the fourth embodiment.
- FIG. 21 is a coordinate system showing a light wavefront on a refraction surface.
- FIG. 22 is a coordinate system showing an optical wavefront due to propagation in the same medium.
- FIG. 23 is a diagram showing an angle difference between local coordinates of an incident light ray and an exit light ray.
- FIG. 24 is a diagram showing the overall configuration of the ordering system of the present invention.
- FIG. 25 is a flowchart showing a procedure for carrying out the present invention.
- FIG. 1 is an optical path diagram at the time of optometry of the spectacle lens according to the first embodiment, wherein FIG. 1 (a) is an optical path diagram in a distant viewing direction, and FIG. 1 (b) is an optical path diagram in a near viewing direction.
- FIG. 2 is an interface screen for finding a light wavefront entering the eye by ray tracing with a computer
- FIG. 3 is a diagram showing the astigmatism distribution and average power of the spectacle lens whose optical values have been determined.
- Figure 17 is a table summarizing input and output data.
- this embodiment is an example in which the spectacle lens is a progressive-power lens, and is based on the “distance and near-distance power difference method” described above. This corresponds to the second method of determining.
- the method for determining the optical value of the spectacle lens according to this embodiment is as follows: a light wavefront at the time of optometry is determined, the light wavefront is set as a target lightwavefront, and the spectacle lens using the spectacle lens to be manufactured is worn by the wearer.
- the ray tracing method is applied to this optical system, and the refractive power and the like of the lens are determined so that the optical wavefront becomes the target optical wavefront.
- a computer having a program for calculating the light wavefront by the ray tracing method uses the input / output screen (interface screen) to display the curve values representing the shape of the front and back surfaces of each lens, the refractive index of the material, the wall thickness, the distance between the lenses, the distance between the rear vertex of the lens and the vertex of the cornea. Enter the distance, the distance between the vertex of the cornea and the center of rotation, and the position of the passing point of the chief ray, which is the light beam emitted from the object point, passing through the lens, and heading toward the center of rotation, and display the calculation results of the optical wavefront. You can ask for it.
- This program can be used even if the lens surface is a special surface (for example, a progressive surface).
- the optometry is performed using an optometry lens (trial) as shown in Fig. 15.
- An optometry method based on a lens exchange method using an Allens lens, a test lens) and a spectacle test frame (temporary frame, trial frame).
- the first to fourth optometry lenses can be interchangeably attached to the ophthalmic examination frame.
- Optometry lenses are named first, second, third, and fourth lenses in order of distance from the eye.
- the light wavefront is a surface with a constant light path length from the light source.
- the wavefront at one point on the ray is orthogonal to the ray.
- the wavefront emanating from a point source is spherical, and its radius is the radius from the point source.
- the wavefront changes shape as it propagates.
- the shape of the light wavefront changes as it is refracted by the lens.
- the calculation of the optical wavefront is to calculate the change due to the propagation of the wavefront in a uniform medium and the change due to the refraction at the interface between different media.
- the incident ray is refracted at point P on the boundary surface.
- the refractive index of the medium on the incident side is N
- the refractive index on the exit side is N '
- the incident angle is 0,
- the exit angle is ⁇ ' '.
- FIG. 21 shows coordinate axes for representing the light wavefront.
- the local coordinate system X-yz that represents the incident wavefront has its origin at P, but is drawn with the X-y axis slightly shifted for clarity.
- the X axis is in the direction along the incident ray, and the y axis is orthogonal to the X axis. Both axes are in the ray plane.
- the z-axis is determined by the right-hand rule and is perpendicular to the ray plane.
- the local coordinate system x, -y, -z representing the exit wavefront is determined in the same manner.
- the local coordinate system XYZ representing the shape near the point P on the boundary surface is determined in the same manner. More than 3 mouths In a single coordinate system, the X and y axes are in the ray plane, and the z axis is the same.
- the incident light wavefront can be expressed by the following equation, omitting the third-order and higher-order terms.
- the wave front includes astigmatism.
- exit light wavefront can be expressed by the following equation, omitting third-order and higher-order terms.
- the shape near the point P on the boundary surface can be expressed by the following equation, omitting the higher-order terms of the third or higher order.
- c "cc yz can be calculated from the interface shape. Determining the change in 3 ⁇ 4 light wavefront by the refraction, known incident wavefront parameters c v, c z, c vz and boundary parameters C y, C From z and C yz , the emission wavefront parameters, and C cz , are determined.
- the above describes the method of calculating the exit wavefront from the incident wavefront and calculating the refractive power of the lens based on the wavefront.
- the refractive power of the lens can be calculated from the refractive index of the material, the radius of curvature of the lens surface, and the wall thickness.
- the carp value is a value obtained by dividing the constant by the radius of curvature of the lens surface, and is in inverse proportion.
- the relationship between each parameter of the single lens and the refractive power can be represented by the following general formula. However, the following equation is an example in the case where the lens surface is spherical, but it can be used in the case of a special surface (for example, a progressive surface) as long as it is limited to an arbitrary minimum range.
- the software for numerically calculating the above formulas is programmed and installed in the calculation device, and the input / output screen (interface screen) shown in Fig. 2 is displayed. It was created.
- the input / output screen of Fig. 2 is described below.
- a distant power test lens layout 1 is arranged above the screen, and a near power test lens layout 8 is arranged below the screen.
- the S power, C power, front curve, rear S, rear S + C, rear C axis, refractive index, thickness interval or lens interval of the optometry lens are input.
- the surface information input section 3 of the distant lens inputs lens surface information such as a progressive surface.
- Each of the first to fourth rows corresponds to a position where an optometry lens is inserted in the spectacle test frame shown in FIG. VC / CR for optometry, VC / CR for wearing are input to VC / CR input section 4 of the distant lens.
- VC at optometry is the distance from the posterior vertex of the fourth lens to the corneal vertex at optometry.
- VC is the distance between the posterior vertex of the spectacle lens and the corneal vertex.
- the VC for optometry and the VC for wearing can be input separately. This is to take into account the differences between the situation at the time of optometry and at the time of wearing.
- CR is the distance between the corneal vertex and the center of rotation.
- the chief ray is a ray that is emitted from the object point at the time of optometry, passes through the optometry lens, and then goes to the center of rotation.
- the passing point position of the principal ray can be designated by the principal ray passing point input section 5 of the distant lens.
- the near power test lens layout section 8 has the same input fields of 9, 10 and 11 as the far power test lens layout section 1.
- An input field for the near working distance from the vertex of the cornea to the object point is added to the principal ray passing point input section 12 of the near lens.
- the near ray tracing start switch unit 13 is clicked with the mouse after inputting the above conditions as data, the above-described calculation is executed. Then, as calculation results, the S frequency, C frequency, and C axis angle for the prescription power for near, the vertex power of the far object, the wavefront of the far object corneal vertex, the wavefront of the near object back vertex, and the wavefront of the near object corneal vertex, respectively.
- the addition power is displayed on the near ray tracing result output unit 14.
- FIG. 2 The screen layout described in FIG. 2 is common to the screen layouts of FIGS. 5, 8, and 11 of the following embodiments.
- the distance refraction optometry value is S + 4.00D, and the number of optometry lenses is only 1 '. This is input to the fourth field of the power input unit 2 of the distant lens layout in FIG.
- the near refraction optometry value is S + 6.50 D, and there is only one optometry lens. This is input to the fourth field of the power input unit 9 of the near lens layout in FIG.
- y represents the vertical position and z represents the horizontal position.
- the near distance must be specified. The short distance is 0.35 m in the example shown in FIG.
- the shape of the light wavefront that enters the eye obtained from the results of ray tracing can be represented by S power, C power, and C axis angle as in the lens prescription.
- S power the shape of the light wavefront
- C power the position on the rear vertex sphere of the spectacle lens
- C axis angle the position on the rear vertex sphere of the spectacle lens
- the traditional ordering method only communicates this prescription frequency from the ophthalmologist or optician.
- the appropriate lens of the patient's eye generates a S + 4.00D wavefront at the position of the posterior vertex sphere when viewing the distance from the far ray tracing result output unit 7 in FIG. From the ray tracing result output unit 14, when viewing an object 350 mm in the vicinity, it is possible to generate a wavefront of S + 3.48 D, C — 0.04 D, A x 90 °. It is a lens that can. These are set as the distance target value and the near target value in the table shown in Embodiment 1 of FIG.
- the lens has a front progressive surface and a rear spherical surface.
- Figure 3 shows the astigmatism distribution and average power (here, mean power error, also called power error) distribution of the progressive surface on the front surface of this progressive power lens.
- the pitch between the contour lines in each figure is 0.25 D pitch.
- the amount of astigmatism increases from the center (main meridian) to the periphery.
- This lens has a front A c t u a l curve 6.88 D, a back curve
- FIG. 13 is an explanatory diagram of a measurement optical system of the lens meter.
- the average frequency is 3.72D.
- the average frequency is calculated as S + C / 2.
- the front face y — 14.0 mm
- this lens is a S + 3.86D, ADD1.88D prescription lens.
- Embodiment 1 in FIG. 17 in which the target value, the design result, and the average power are summarized, the average power of the far wavefront and the near wavefront is almost equal to the wavefront at the time of optometry.
- the manufacture and ordering of spectacle lenses are performed using the frequency data of the design results shown in this table.
- This is the above-mentioned “distance-to-near-distance lens power difference method using a refractor lens”, and corresponds to the third method for determining the addition power of a progressive-power lens.
- FIG. 4 is an optical path diagram at the time of optometry according to the second embodiment
- FIG. 5 is an interface screen for obtaining a light wavefront entering the eye by ray tracing by a computer
- FIG. 6 is a diagram in which optical values are determined.
- FIG. 18 is a diagram showing an astigmatism distribution diagram and an average power of the spectacle lens
- Embodiment 2 in FIG. 18 is a table summarizing input / output data.
- This embodiment is the above-mentioned “near-vision lens addition method” and corresponds to a first method for determining the addition power of a progressive-power lens.
- the distance refraction optometry value is S-1.500 D, and there is only one optometry lens. This is input into the fourth field of the frequency input section 2 of the remote lens layout in FIG.
- the near refraction optometry value is S-2.50D, and there are two optometry lenses, S-5.00D and S + 2.50D.
- S ⁇ 5.00 D is written in the fourth field in the same manner as this far refraction optometry value, and S + is written in the third field. 2. Enter 50 D.
- the prescription of the progressive power lens examined is S-5.00D and ADD2.50D.
- this prescription frequency can only be reported from the ophthalmologist or optician.
- the appropriate lens for the patient's eyes can be obtained from the far ray tracing result output unit 7 shown in Fig. 5, which generates an S-5.00D wavefront at the rear vertex spherical position when looking far away, and From the result output unit 14, a lens that can generate a wavefront of S—5.41D, C-0.02D, and A180 ° when viewing an object 350 mm in the vicinity is there.
- These are the distance target value and the near target value in the table shown in Embodiment 2 in FIG. 18.
- a lens designed based on this wavefront data will be described.
- the lens has a front progressive surface and a rear spherical surface.
- FIG. 6 shows the astigmatism distribution and the average power distribution on the front surface of the progressive power lens.
- the display method is the same as in FIG.
- This lens has a frontal actual curve of 3.99 D, a backside curve of 9.00 D, a refractive index of 1.70, and a wall thickness of 1. O mm.
- the average frequency is one 2.61D.
- the difference is 2.20 D.
- this lens is a prescription lens of S-4.82D, ADD2.20D.
- a spherical wavefront launched from a near 350 mm object produces a wavefront at the posterior vertex spherical position: S—5.38D, C-0.10D, AX100. It is.
- Embodiment 3 According to Embodiment 2 in FIG. 18 in which the target value, the design result, and the average power are summarized, the average power of the far wavefront and the near wavefront almost coincides with the wavefront at the time of optometry. Spectacle lenses are manufactured and ordered using the frequency data of the design results shown in this table. (Embodiment 3)
- FIG. 7 is an optical path diagram at the time of optometry according to the third embodiment, in which FIG. 7 (a) is an optical path diagram in the direction of distant viewing, FIG. 7 (b) is an optical path diagram in the direction of near viewing, Fig. 8 is an interface screen for finding the light wavefront that enters the eyes by ray tracing with a computer, and Fig. 9 is a diagram showing the astigmatism distribution map and average power of the spectacle lens whose optical values have been determined.
- Embodiment 3 in FIG. 19 is a table summarizing input / output data.
- This embodiment is the above-mentioned “near-vision lens addition method” and corresponds to a first method for determining the addition power of a progressive-power lens.
- the distance refraction optometry value S + 4.00 D, C-2.00 DAX 30 °, and the optometry lens is S + 4.00 D and C — It is two pieces of 2.0 D. This is input as S + 4.00D in the fourth field of the power input section 2 of the far lens layout in FIG. 8, and C-2.00D in the second field.
- the near optometry lens is a form in which one S + 2.50D lens is added to a distant refraction optometry lens. This is shown in the fourth and second columns of the power input section 9 of the near lens layout in FIG. 8 in the same manner as the distance refraction optometry values in the fourth and second columns, S + 4.00D and C—2.00. Enter D, then enter S + 2.50D in the third column.
- the prescription data of the progressive power lens examined are S + 4.00D, C—2.00D, AX30 °, and ADD2.50D. Only communicated by a doctor or optician. In fact, the appropriate lens for the patient's eyes can be obtained from the distant ray tracing result output unit 7 in Fig. 8 at the rear vertex spherical position when viewing the distant point, S + 4.00D, C-2.03D. , AX 30. From the near ray tracing result output unit 14 S + 3.50 D, C-2.01 D, A x 30.5 when viewing a 350 mm object. Is a lens that can generate a wavefront of These are the distance target value and the near target value in the table shown in Embodiment 3 in FIG.
- the lens consists of a front progressive surface and a rear toric surface.
- FIG. 9 shows the astigmatism distribution and the average power distribution of the progressive surface in front of this progressive refractive lens.
- the display method is the same as in FIG.
- the front has an Actua l curve of 6.88 D
- the rear has an S-direction curve of 3.00 D and a C-direction curve of 5.00 D, a refractive index of 1.70, and a wall thickness of 4.5 mm.
- the difference between the average frequencies is 1.94 D.
- this lens is a prescription lens of S + 3.96D, C-2.00D, Ax26 ° D and ADD1.94D.
- a spherical wave launched from an object 350 mm in the vicinity produces a wavefront at the rear vertex spherical position at S + 3.29 D, C-1.58 D, A 33.0 ° .
- FIG. 10 is an optical path diagram at the time of optometry according to the fourth embodiment.
- FIG. 11 is an interface screen for obtaining a light wavefront entering the eye by tracing a ray with a computer
- FIG. 12 is an optical value.
- FIG. 20 is a diagram showing an astigmatism distribution map and an average power of the spectacle lens in which is determined
- FIG. 20 is a table summarizing input / output data.
- This embodiment is the above-mentioned "method of setting the auxiliary refractive power to be the additional refractive power”, and corresponds to the IS method of determining the additional refractive power of the progressive-power lens.
- the distance refraction optometry value is S + 4.00D, and there is only one optometry lens. This is input as S + 4.00D in the fourth field of the power input section 2 of the distance lens layout shown in FIG.
- the near refraction value can be determined by measuring the distance of the near point of adjustment using the distant optometry lens instead of the optometry lens. Therefore, S + 4.00D is also input to the fourth column of the power input unit 9 for the near lens layout in FIG. 11 in the same manner as the distance refraction optometry value.
- the adjusted near point distance distance from the cornea
- the distance is input to the near distance 12 in FIG.
- the rear vertex wavefront when viewing an object point at the near point distance is S + 3.03D and C ⁇ 0.08D.
- the nominal addition is (1 / 0.35m-1l Z lm), about 1.86D It is.
- the prescription data of the progressive power lens examined are S + 4.00 D and ADD 1.86 D. However, since the addition power that is usually manufactured is 0.25 D pitch, AD D 1. 75 D or 2.0 D. With the traditional ordering method, this prescription frequency can only be reported from the ophthalmologist or optician. Indeed, a lens suitable for the patient's eye will generate an S + 4.00 wavefront at the posterior vertex sphere when looking farther than the output result in Figure 11 and see an object closer to 350 mm Sometimes a lens that can generate a wavefront of S + 3.03D and C-0.08D. These are set as the distance target value and the near target value in the table shown in Embodiment 4 of FIG.
- the lens has a front progressive surface and a rear spherical surface.
- FIG. 12 shows the astigmatism distribution and the average power distribution on the front surface of the progressive power lens.
- the display method is the same as in FIG.
- This lens has a front Actual curve 7.09D, a rear curve 3.20D, a refractive index of 1.70, and a wall thickness of 1.0 mm.
- the difference between the average frequencies is 1.48 D.
- this lens is a prescription lens of S + 3.73D, C-0.03D, AxO °, ADDL.48D.
- the wavefront generated at the position is S + 3.41D, C-0.83D, AX103 °.
- Embodiment 4 in FIG. 20 in which the above-described target value, design result, and average power are summarized, the average power of the far wavefront and the near wavefront almost coincides with the wavefront at the time of optometry.
- Spectacle lenses are manufactured and ordered using the frequency data of the design results shown in this table.
- the optometry lens and eyeglass test frame actually used for subjective optometry using the lens exchange method may not be exactly the same, and the specifications may differ slightly depending on the manufacturer. May be.
- the lens curve or lens center thickness may differ depending on the manufacturer, or the refractive index of the lens material may differ depending on the refractive power.
- the gap between the mounting positions of the optometry lenses may vary, for example, by about 3.5 to 6 mm depending on the manufacturer.
- the specifications of these optometry lenses in order to accurately calculate the state of the light wavefront at the time of optometry, the specifications of these optometry lenses, the value of the distance between the lens mounting positions of the eyeglass test frame, and the position of Information such as whether a optometry lens is attached to the eye or the distance between the optometry lens closest to the eyeball and the vertex of the cornea, etc., is required. If the distance between the spectacle lens when worn and the patient's cornea is expected to be different from the distance between the optometry lens and the cornea during optometry, it is expected The distance between the spectacle lens and the patient's cornea when wearing spectacles is also information necessary for accurately calculating the state of the light wavefront during optometry.
- the refractive power of the optometry lens used for determining the addition refractive power is a relatively weak refractive power mainly in the range of 1.0 to 3.00D. From these facts, if it is not possible to actually obtain precise information such as the distance between the mounting positions of the optometry lenses in the eyeglass test frame, the mounting positions of the optometry lenses, and the shape of the optometry lenses, the standard values should be used. Calculating the light wavefront at the time of optometry using it is also a practical means in practice.
- the standard value of the interval between the mounting positions of the optometry lens in the eyeglass test frame is 4 mm
- the distance between the optometry lens closest to the eyeball and the corneal vertex, and the progressive power lens to be ordered are The distance between the spectacle lens and the patient's cornea when wearing the finished spectacles in the spectacle frame to the patient is 12 mm
- the standard shape of the optometry lens is the convex shape, center thickness and refractive index. This is shown in Table 1 in Figure 14.
- the light wavefront at the time of optometry is calculated and calculated. It is better to give the addition power of the progressive-power lens based on this.
- the order information of the progressive power lens does not actually include the information on the optometry method
- a plurality of specifications are prepared for the method of providing the addition power of the progressive power lens, and each of them is standardized. If an optometry method that uses typical values is used, the same effect can be obtained because the light wavefront at the time of optometry can be calculated even by including the specification of how to give the additional refractive power in the ordering information.
- the spectacle lens is a progressive-power lens
- this may be another type of lens.
- the ordering system for example, the ordering system shown in Fig. 24
- the configuration of the system can be considered. That is, the terminal device 101 installed at the orderer side of the spectacle lens (the spectacle store 100) is connected to the terminal device 101 via the public communication line 300 (including an indirect method using a server or the like).
- spectacle lens information, spectacle frame information, and identification information of the addition power determining method of how the prescription power and addition power were determined at the time of optometry through the terminal device 101 of the orderer.
- the design and / or processing condition data information selected as necessary from among the prescription values including the information, layout information, and information including the processing designation information is transmitted to the arithmetic unit 201 of the eyeglass lens processor.
- the input means of the prescription value including the identification information of the above-described addition refractive power determination method may use, for example, the interface screen of FIG. It is assumed that the processor of the ophthalmic lens receives the order by receiving the prescription value including the identification information of the method for determining the addition refractive power to the arithmetic unit.
- the following manufacturing methods can be considered. That is, it includes the identification information of the method of determining the addition power, which is used to determine the prescription power and the addition power at the time of optometry, which is transmitted to the arithmetic unit installed on the eyeglass lens processor. Based on the information, the appropriate value of the actual addition power to be actually given to the progressive-power lens is determined, and the spectacle lens is designed. Then, at the manufacturing site, a lens blank is selected based on the processing instruction, and the NC cutting device performs cutting and polishing lens processing. Surface treatment (wear-resistant hard coat film formation, anti-reflection film formation, lens dyeing, water-repellent treatment, ultraviolet ray cut film formation, anti-fog treatment, etc.) is also processed here.
- a prescription lens having a circular shape is completed.
- the circular lens is subjected to beveling or flattening of the periphery based on the eyeglass layout information in accordance with a predetermined lens shape.
- Flattening or flattening Processing is performed in a machining center. This processing is performed, for example, by using the tool and processing method described in Japanese Utility Model Laid-Open No. 6-17853, which is proposed by the present applicant, and Japanese Patent Laid-Open No. 6-34923.
- the processing conditions include selection of glass type (glass, plastic, polystyrene, acrylic, etc.), selection of frame material, input of frame PD (FPD, DBL), PD (binocular) , One eye) input, horizontal eccentricity X input, vertical eccentricity Y input, astigmatic axis input, finish size input, bevel shape designation, etc. are used, and these are automatically programmed by the program when the processing mode of the processing device is set. Is introduced. Then, when the predetermined items are set and the start switch is pressed, the peripheral edge processing is automatically performed. In this way, a beveled or flattened peripheral lens is manufactured, and after the inspection process, it is shipped to the eyeglass lens supplier at the factory.
- the orderer of the spectacle lens attaches the processed lens to the selected spectacle frame and assembles it. Further, in the present embodiment, the mode in which the beveling or flattening of the periphery is performed by the manufacturer has been described, but this may be performed by the orderer of the spectacle lens.
- FIG. 25 A flowchart for carrying out the present invention is shown in FIG. 25 and will be described.
- Step 3 Assembling finished eyeglasses at an eyeglass store
- the light wavefront that enters the eye of the examinee at the time of optometry and the optical wavefront that enters the eye when the examinee wears the spectacle lens and looks at the object match or approximate to each other.
- the optical characteristic of the spectacle lens is selected and determined. This makes it possible to minimize the "sway” and “distortion” experienced when wearing spectacles.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2004542835A JP4124468B2 (ja) | 2002-10-08 | 2003-10-07 | 眼鏡レンズの光学値の決定方法、眼鏡レンズの製造方法、眼鏡レンズ及びその受発注システム |
US10/486,720 US7118215B2 (en) | 2002-10-08 | 2003-10-07 | Method for determining optical value of lens of eyeglasses, process for producing lens of eyeglasses, lens of eyeglasses and its ordering/ordr receiving system |
EP03751356.1A EP1553438B1 (en) | 2002-10-08 | 2003-10-07 | Method for determining optical value of lens of eyeglasses, process for producing lens of eyeglasses, lens of eyeglasses and its ordering-receiving system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2002-295315 | 2002-10-08 | ||
JP2002295315 | 2002-10-08 |
Publications (1)
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WO2004034131A1 true WO2004034131A1 (ja) | 2004-04-22 |
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ID=32089208
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PCT/JP2003/012820 WO2004034131A1 (ja) | 2002-10-08 | 2003-10-07 | 眼鏡レンズの光学値の決定方法、眼鏡レンズの製造方法、眼鏡レンズ及びその受発注システム |
Country Status (4)
Country | Link |
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US (1) | US7118215B2 (ja) |
EP (1) | EP1553438B1 (ja) |
JP (1) | JP4124468B2 (ja) |
WO (1) | WO2004034131A1 (ja) |
Cited By (7)
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JP2007171901A (ja) * | 2005-11-25 | 2007-07-05 | Tokai Kogaku Kk | 累進屈折力レンズのチェック方法 |
WO2009028685A1 (ja) * | 2007-08-31 | 2009-03-05 | Hoya Corporation | 累進屈折力レンズの評価方法および評価装置、並びに累進屈折力レンズの製造方法 |
JP2010054474A (ja) * | 2008-08-29 | 2010-03-11 | Hoya Corp | 累進屈折力レンズの光学性能評価方法 |
JP2012524293A (ja) * | 2009-04-17 | 2012-10-11 | エシロー・インターナショナル | 眼鏡レンズを決定する方法 |
JP2013076740A (ja) * | 2011-09-29 | 2013-04-25 | Seiko Epson Corp | 累進屈折力レンズ |
JP2013246317A (ja) * | 2012-05-25 | 2013-12-09 | Hoya Corp | 累進屈折力レンズの製造方法 |
JPWO2015186766A1 (ja) * | 2014-06-04 | 2017-04-20 | ホヤ レンズ タイランド リミテッドHOYA Lens Thailand Ltd | 累進屈折力レンズ |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4807801B2 (ja) * | 2005-06-03 | 2011-11-02 | Hoya株式会社 | 累進多焦点コンタクトレンズの設計方法 |
US10613347B2 (en) | 2012-01-11 | 2020-04-07 | Rodenstock Gmbh | Population of an eye model for optimizing spectacle lenses with measurement data |
DE102012000390A1 (de) * | 2012-01-11 | 2013-07-11 | Rodenstock Gmbh | Brillenglasoptimierung mit individuellem Augenmodell |
JP6276691B2 (ja) | 2012-08-20 | 2018-02-07 | Hoya株式会社 | シミュレーション装置、シミュレーションシステム、シミュレーション方法及びシミュレーションプログラム |
KR20180118116A (ko) | 2016-03-04 | 2018-10-30 | 에씰로 앙터나시오날 | 안과용 렌즈를 주문하는 방법 및 해당 시스템 |
KR102580695B1 (ko) | 2016-03-04 | 2023-09-21 | 에씰로 앙터나시오날 | 안과용 렌즈 및 상응하는 전자 디바이스를 특성화하는 굴절력값을 결정하는 방법 |
DE102017007975B4 (de) | 2017-01-27 | 2018-12-27 | Rodenstock Gmbh | Computerimplementiertes Verfahren, Vorrichtung und Computerprogrammerzeugnis für die Belegung eines Augenmodells zur Optimierung von Brillengläsern mit Messdaten |
DE102018002630B4 (de) * | 2018-03-29 | 2024-03-28 | Rodenstock Gmbh | Angleich der subjektiven und objektiven Refraktionen |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007171901A (ja) * | 2005-11-25 | 2007-07-05 | Tokai Kogaku Kk | 累進屈折力レンズのチェック方法 |
WO2009028685A1 (ja) * | 2007-08-31 | 2009-03-05 | Hoya Corporation | 累進屈折力レンズの評価方法および評価装置、並びに累進屈折力レンズの製造方法 |
JP5107359B2 (ja) * | 2007-08-31 | 2012-12-26 | Hoya株式会社 | 累進屈折力レンズの評価方法および評価装置、並びに累進屈折力レンズの製造方法 |
US8386203B2 (en) | 2007-08-31 | 2013-02-26 | Hoya Corporation | Method and device for evaluating graduated refraction power lens and method for manufacturing graduated refraction power lens |
JP2010054474A (ja) * | 2008-08-29 | 2010-03-11 | Hoya Corp | 累進屈折力レンズの光学性能評価方法 |
JP2012524293A (ja) * | 2009-04-17 | 2012-10-11 | エシロー・インターナショナル | 眼鏡レンズを決定する方法 |
JP2013076740A (ja) * | 2011-09-29 | 2013-04-25 | Seiko Epson Corp | 累進屈折力レンズ |
JP2013246317A (ja) * | 2012-05-25 | 2013-12-09 | Hoya Corp | 累進屈折力レンズの製造方法 |
JPWO2015186766A1 (ja) * | 2014-06-04 | 2017-04-20 | ホヤ レンズ タイランド リミテッドHOYA Lens Thailand Ltd | 累進屈折力レンズ |
US10642070B2 (en) | 2014-06-04 | 2020-05-05 | Hoya Lens Thailand Ltd. | Progressive addition lens |
Also Published As
Publication number | Publication date |
---|---|
EP1553438A1 (en) | 2005-07-13 |
EP1553438B1 (en) | 2017-08-02 |
US20040257527A1 (en) | 2004-12-23 |
EP1553438A4 (en) | 2011-04-06 |
JPWO2004034131A1 (ja) | 2006-02-09 |
US7118215B2 (en) | 2006-10-10 |
JP4124468B2 (ja) | 2008-07-23 |
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