WO2018079835A1 - Procédé d'évaluation de verre de lunettes, procédé de conception de verre de lunettes, procédé de fabrication de verre de lunettes et dispositif d'évaluation de verre de lunettes - Google Patents

Procédé d'évaluation de verre de lunettes, procédé de conception de verre de lunettes, procédé de fabrication de verre de lunettes et dispositif d'évaluation de verre de lunettes Download PDF

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Publication number
WO2018079835A1
WO2018079835A1 PCT/JP2017/039344 JP2017039344W WO2018079835A1 WO 2018079835 A1 WO2018079835 A1 WO 2018079835A1 JP 2017039344 W JP2017039344 W JP 2017039344W WO 2018079835 A1 WO2018079835 A1 WO 2018079835A1
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WIPO (PCT)
Prior art keywords
spectacle lens
adjustment
convergence
evaluation method
visual acuity
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PCT/JP2017/039344
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English (en)
Japanese (ja)
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成鎮 趙
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株式会社ニコン・エシロール
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Publication of WO2018079835A1 publication Critical patent/WO2018079835A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/02—Testing optical properties
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]

Definitions

  • the present invention relates to a spectacle lens evaluation method, a spectacle lens design method, a spectacle lens manufacturing method, and a spectacle lens evaluation apparatus.
  • the spectacle lens evaluation method calculates the visual acuity for an object in a predetermined distance and a predetermined direction when viewed through the spectacle lens based on the convergence adjustment, Evaluating the spectacle lens based on the calculated visual acuity.
  • the spectacle lens design method designs the spectacle lens using the visual acuity calculated by the spectacle lens evaluation method of the first aspect or a parameter calculated from the visual acuity as an evaluation function.
  • a method for manufacturing a spectacle lens includes: designing the spectacle lens by the design method of the second aspect; manufacturing the spectacle lens designed by the design method; including.
  • the spectacle lens evaluation device calculates a visual acuity for an object in a predetermined distance and a predetermined direction when viewed through the spectacle lens based on the convergence adjustment;
  • An evaluation unit that evaluates the spectacle lens based on the calculated visual acuity.
  • FIG. 1 It is a conceptual diagram for demonstrating the evaluation method of the spectacle lens of one Embodiment. It is a conceptual diagram for demonstrating a congestion stimulus and a congestion response. It is a figure which shows the structure of the spectacle lens manufacturing system in the evaluation method of the spectacle lens of one Embodiment. It is a flowchart which shows the flow of the manufacturing method of the spectacle lens containing the evaluation method of the spectacle lens of one Embodiment. It is a flowchart which shows the process of the spectacle lens evaluation part in the evaluation method of the spectacle lens of one Embodiment. It is a figure which shows an example of the calculation model in the evaluation method of the spectacle lens of one Embodiment. FIG.
  • FIG. 7A is a graph showing a change in accommodation response for each age without near vision correction
  • FIG. 7B shows a change in accommodation response for each age with near vision correction. It is a graph. It is a figure which shows an example of the calculation model in the evaluation method of the spectacle lens of one Embodiment.
  • the spectacle lens evaluation method of this embodiment calculates an adjustment response in binocular vision based on the adjustment (Accommodation) and convergence (Vergence) of the spectacle lens wearer, and determines the visual acuity based on the adjustment response.
  • a diopter hereinafter referred to as “D”
  • reference numerals for example, 9L, 9R, etc.
  • reference numerals in the drawings including symbols such as L, R, etc. corresponding to the left and right are numbers with L and R omitted (for example, 9) and are limited to the left and right. Indicates no reference.
  • FIG. 1 is a schematic diagram for explaining a spectacle lens evaluation method of the present embodiment.
  • the left eye 9L and the right eye 9R of the wearer are trying to focus on the point of interest 6 of the object 5 through the spectacle lenses 7L and 7R, respectively.
  • the distance from the point of interest 6 to the eyeball 9 is referred to as an adjustment stimulus AS.
  • the distance of the adjustment stimulus AS or the like may be defined by the refractive power of the eye necessary for focusing on the object.
  • the distance is expressed in units of diopters.
  • the regulatory stimulus AS is defined by the distance between the attention point 6 and the cornea front surface of the eyeball 9.
  • the attention point 6 and the rotation center point or retina of the eyeball 9 or a specific reference point of the eye optical system may be defined by the distance to etc.
  • the positional relationship between the eyeball 9, the spectacle lens 7, the object 5 and the like may be determined by three-dimensional coordinates.
  • the center (center) of a line connecting the front cornea of the left eyeball 9L and the front cornea of the right eyeball 9R can be set as the origin of the three-dimensional coordinates.
  • the direction of the line connecting the front surfaces of the left and right corneas can be the X axis
  • the horizontal direction orthogonal to the X axis can be the Y axis
  • the direction orthogonal to the X axis and the Y axis can be the Z axis.
  • the coordinate system may be set in the same manner as described above based on a line connecting the rotation center points 99 of the left and right eyeballs 9, a line connecting the apexes of the left and right retinas, and the like. Any reference point in the coordinate system can be set as the origin.
  • the method for setting the coordinate system is not particularly limited as long as desired calculation can be realized.
  • the distance and the direction can be determined based on the set three-dimensional coordinates.
  • the wearer changes or equalizes the thicknesses of the crystalline lenses 8L and 8R to change the optical characteristics such as the focal length of the eye optical system inside the eyeball 9, thereby focusing on the attention point 6. Try to match.
  • the change due to this adjustment is schematically shown by a bidirectional arrow 92 inside the eyeball 9.
  • FIG. 1 an example of rotation due to convergence is schematically shown by a bidirectional curved arrow 91 on the front surface of the eyeball 9.
  • a stimulus that causes congestion is referred to as a congestion stimulus VS described in detail later.
  • the adjustment stimulus AS and the convergence stimulus VS cause a change in the focus position of the eye optical system and the rotation of the eyeball 9, and the wearer focuses on the gazing point 60.
  • a light beam that forms an image on the eyeball 9 from the gazing point 60 is schematically shown by a one-dot chain line.
  • the distance from the gazing point 60 to the eyeball 9 is referred to as an adjustment response AR
  • the difference in distance between the adjustment stimulus AS and the adjustment response AR is referred to as an adjustment error AE.
  • FIG. 2 is a schematic diagram for explaining the congestion stimulus VS and the congestion response VR.
  • the convergence stimulus VS includes a straight line corresponding to the direction of the line of sight before passing through the spectacle lens 7L when the left eyeball 9L completely matches the attention point 6 of the object 5 through the spectacle lens 7L, and the right eyeball.
  • 9R is represented by an angle formed by a straight line corresponding to the direction of the line of sight before passing through the spectacle lens 7R when the convergence is completely matched with the attention point 6 of the object 5 through the spectacle lens 7R. Therefore, in order to make the explanation easy to understand in FIG.
  • the convergence stimulus VS is shown as an angle between two straight lines connecting the eyeball rotation center points 99L and 99R and the point of interest 6, but in the eyeglass lenses 7L and 7R, In reality, the intersection of the straight lines corresponding to the direction of the line of sight when the convergence of the eyes to the attention point 6 completely coincides with the attention point 6 can be shifted from the attention point 6 by the prism or the like.
  • the convergence response VR includes a straight line extending in the direction of the line of sight before passing through the spectacle lens 7L of the left eye 9L and the direction of the line of sight before passing through the spectacle lens 7R of the right eye 9R when the gazing point 60 is congested. It is expressed as an angle formed by a straight line extending to Therefore, in FIG. 2, for easy understanding, a straight line connecting the eyeball rotation center point 99L of the left eye 9L and the gazing point 60 and a straight line connecting the eyeball rotation center point 99R of the right eye 9R and the gazing point 60 are formed.
  • the congestion error VE is represented by a difference between the congestion stimulus VS and the congestion response VR.
  • the vergence stimulus VS and the vergence response VR are converted into meter angle units determined by the distance or the reciprocal of the optical path length, etc., which are known to those skilled in the art, as appropriate for the convenience of calculation. Perform the calculation process in the method.
  • an index relating to congestion such as the convergence error VE is calculated by appropriately converting into a unit of meter angle.
  • the regulation response AR and the congestion response VR are determined while the regulation and the convergence are linked to the regulation stimulus AS and the congestion stimulus VS by the attention point 6 and influence each other.
  • the convergence that occurs when the adjustment stimulus is applied is the accommodation convergence, and the adjustment that occurs when the convergence stimulus is applied is the convergence adjustment.
  • the spectacle lens evaluation method of this embodiment calculates an adjustment response AR, an adjustment error AE, and the like based on a model that takes into account the mutual effects of adjustment and convergence, and calculates visual acuity based on the adjustment response AR. To do.
  • FIG. 3 shows a spectacle lens manufacturing system 100 including a spectacle lens evaluation device 10 which is a main body for executing the spectacle lens evaluation method of the present embodiment.
  • the spectacle lens manufacturing system 100 includes a spectacle lens evaluation device 10, a processing machine control device 101, and a spectacle lens processing machine 102.
  • the spectacle lens evaluation device 10 includes an input unit 11, a display unit 12, a communication unit 13, a storage unit 14, and a control unit 20.
  • the control unit 20 of the spectacle lens evaluation apparatus 10 includes a spectacle lens design unit 21 and a spectacle lens evaluation unit 22.
  • the spectacle lens evaluation unit 22 includes a stimulus calculation unit 23, an adjustment response calculation unit 24, and a visual acuity calculation unit 25.
  • the arrows in the figure indicate the flow of spectacle lens design data.
  • the input unit 11 is composed of an input device such as a keyboard, and is data relating to adjustment / congestion such as age of the wearer, prescription data, frame shape, congestion adjustment and adjustment congestion necessary for processing in the control unit 20 described later.
  • the input of input data etc. is received.
  • the input unit 11 outputs input data to the control unit 20 and also outputs and stores the input data in a storage unit 14 described later. Note that a configuration in which the communication unit 13 described later receives input data and outputs the input data to the control unit 20 can also be adopted.
  • the display unit 12 is configured by a device capable of displaying an image such as a liquid crystal monitor, and various numerical values such as input prescription data, evaluation results of the spectacle lens 7, and design data of the spectacle lens 7 based on the evaluation result. Etc. are displayed.
  • the communication unit 13 is configured by a communication device capable of communicating via the Internet or the like, and transmits the evaluation result of the spectacle lens 7 obtained by the processing of the control unit 20, the design data of the spectacle lens 7 based on the evaluation result, Send and receive necessary data as appropriate.
  • the storage unit 14 is configured by a non-volatile storage medium such as a memory or a hard disk.
  • the storage unit 14 exchanges data with the control unit 20, and the input data received by the input unit 11 and the spectacle lens 7 obtained by the processing of the control unit 20.
  • Various data such as the evaluation result and design data of the spectacle lens 7 based on the evaluation result are stored.
  • the control unit 20 is configured by a CPU or the like, functions as a main body for controlling the spectacle lens evaluation device 10, and executes a program mounted in a non-volatile memory arranged in the storage unit 14 or the control unit 20. Thus, various processing including spectacle lens evaluation processing is performed.
  • Each function of the control unit 20 may be distributed and arranged in a plurality of devices, and may be configured to perform processing as a single system as a whole while communicating information between the devices.
  • the spectacle lens design unit 21 designs the spectacle lens 7 based on prescription data input from the input unit 11 and / or an evaluation result of the spectacle lens evaluation unit 22 described later. A part or all of the design of the spectacle lens 7 may be performed in a design apparatus outside the spectacle lens evaluation apparatus 10. Moreover, the kind of spectacle lens 7 is not specifically limited, It can set to spectacle lenses of arbitrary types, such as a progressive-power lens.
  • the spectacle lens evaluation unit 22 calculates an adjustment response AR or the like when the wearer views the object 5 in a predetermined distance and a predetermined direction through the spectacle lens 7, and calculates visual acuity based on the adjustment response AR. .
  • the stimulus calculation unit 23 calculates the adjustment stimulus AS and the convergence stimulus VS by the object 5.
  • the adjustment response calculation unit 24 calculates an adjustment response AR, an adjustment error AE, a congestion response VR, a congestion error VE, and the like based on a model that takes into account the mutual effects of the wearer's adjustment and congestion.
  • the visual acuity calculation unit 25 calculates visual acuity when the wearer views an object in a predetermined distance and a predetermined direction through the spectacle lens 7. The calculation process of the spectacle lens evaluation unit 22 will be described in detail below.
  • the processing machine control device 101 controls the spectacle lens processing machine 102 based on the design data of the spectacle lens 7 transmitted from the spectacle lens evaluation device 10.
  • the eyeglass lens processing machine 102 manufactures the eyeglass lens 7 under the control of the processing machine control device 101.
  • FIG. 4 is a flowchart showing the flow of the spectacle lens design method and spectacle lens manufacturing method including the spectacle lens evaluation method of the present embodiment.
  • the input unit 11 receives inputs such as the wearer's age, prescription data and frame shape of the eyeglass lens 7, and data related to adjustment / congestion.
  • the prescription data includes the spherical power, astigmatism power, and astigmatic axis of the prescribed spectacle lens 7, the interpupillary distance of the wearer, and the like. If the prescribed spectacle lens is a progressive power lens, the prescription data further includes addition power and the like. .
  • the input prescription data is output to the spectacle lens design unit 21 of the control unit 20.
  • step S1001 ends, the process proceeds to step S1003.
  • the spectacle lens design unit 21 provisionally designs the spectacle lens 7 based on the input prescription data, frame shape, and the like.
  • the spectacle lens design unit 21 determines the shape and refractive index of the spectacle lens 7, the refractive index, the frequency distribution on the object side surface and the eyeball side surface, and the like based on the spherical power, astigmatism power and astigmatic axis of the prescription data, the interpupillary distance of the wearer, and the like. Determine the point aberration distribution.
  • step S1003 ends, the process proceeds to step S1005.
  • step S1005 the spectacle lens 7 provisionally designed in step S1003 is evaluated by visual acuity based on the wearer's adjustment and convergence. Step S1005 will be described later based on the flowchart of FIG. When step S1005 ends, the process proceeds to step S1007.
  • step S1007 the control unit 20 determines whether or not the evaluation of the temporarily designed spectacle lens 7 is equal to or higher than a predetermined reference.
  • the control unit 20 incorporates the visual acuity calculated in step S1005 into a function (evaluation function) for evaluating the spectacle lens in the process of optimizing the spectacle lens, and uses this evaluation function to evaluate and design the spectacle lens. Do.
  • the control unit 20 makes a positive determination in step S1007 and proceeds to step S1009.
  • the control unit 20 makes a negative determination in step S1007 and returns to step S1003 to perform redesign.
  • the predetermined condition is, for example, a value of visual acuity for a distance and / or direction that a wearer often sees daily and an average value of the visual acuity of 0.8 or 1.0 or more, Set as appropriate.
  • a determination as to whether or not the wearer or the salesperson of the eyeglass lens store will redesign is input, and according to the determination
  • the controller 20 may determine whether to redesign.
  • step S1009 the spectacle lens design unit 21 sets the temporarily designed spectacle lens 7 as a design-completed product or performs fine final adjustment as appropriate to complete the design of the spectacle lens 7, and the spectacle lens processing machine 102 The designed spectacle lens 7 is manufactured.
  • FIG. 5 is a flowchart showing the process flow of step S1005 in the flowchart of FIG.
  • step S2001 the stimulus calculation unit 23 calculates the position of the temporarily designed spectacle lens 7 when the wearer wears the spectacle lens 7.
  • the stimulus calculation unit 23 uses the general or statistical average data based on a general difference in the shape of the eye part depending on the age and race of the wearer, and the eyeball 9 and the spectacle lens of the wearer. 7 is set, and a relative three-dimensional positional relationship between the spectacle lens 7 and the eyeball 9 of the wearer is determined.
  • step S2003 the shape data regarding the wearer's eyeball 9 and its periphery are measured and input to the spectacle lens evaluation apparatus 10, the stimulus calculation unit 23 uses the shape data to compare the spectacle lens 7 and the wearer's eyeball 9 relative to each other. A typical three-dimensional positional relationship may be determined.
  • step S2003 the stimulus calculation unit 23 calculates an adjustment stimulus AS when the wearer views an object in a predetermined distance and a predetermined direction.
  • the stimulus calculation unit 23 calculates the position on the lens surface of the binocular spectacle lens 7 through which the line of sight passes when the wearer views an object in a predetermined direction at a predetermined distance.
  • the line-of-sight passing position on the lens may be calculated for the time being under simplified conditions such as not considering the adjustment error AE.
  • the stimulus calculation unit 23 calculates the adjustment stimulus AS as a distance to the object, calculates the optical path to the object 5 from the refractive power of the lens at the passing position of the line of sight, and appropriately selects the adjustment stimulus AS from the optical path. It can be corrected.
  • the stimulus calculation unit 23 calculates the convergence stimulus VS from the inter-pupil distance in the optical path and prescription data.
  • the stimulus calculation unit 23 sets the adjustment stimulus AS by taking a value such as an arithmetic average of the adjustment stimulus corresponding to each distance.
  • step S2003 ends, the process proceeds to step S2005.
  • the stimulus calculation unit 23 may take a weighted average of the adjustment stimuli AS corresponding to each distance.
  • the stimulus calculation unit 23 changes the weight on the left and right according to the horizontal position of the object 5, that is, the position in the direction connecting both eyes, or the angle between the position of the object 5 and the straight line connecting the eyeball and the front direction of the eyeball.
  • the weighted average may be taken.
  • the stimulus calculation unit 23 can be set, for example, such that the weight value corresponding to the right eye increases and the weight value corresponding to the left eye decreases as the object 5 moves to the right eye side. Further, the stimulus calculation unit 23 can add a higher weight value to the adjustment stimulus AS on the dominant eye side than on the non-dominant side.
  • step S2005 the adjustment response calculation unit 22 calculates an adjustment response AR using a feedback model based on the optical characteristics of the portion of the spectacle lens 7 through which the line of sight passes and the data relating to the adjustment / congestion of the wearer.
  • the adjustment response calculation unit 22 calculates the adjustment response AR based on a nonlinear static model of the visual system.
  • a nonlinear static model of the visual system For details of nonlinear static models, see the well-known literature ("Quantitative Analysis of the Accommodative Convergence to Accommodation Ratio: Linear and Nonlinear Static Models '' IEEE TRANSACITONS ON BIOMEDICAL ENGINEERING, 306-316, Vol.44, No.4, 1997. Refer to).
  • FIG. 6 is a conceptual diagram for explaining the nonlinear static model.
  • the feedback circuit diagram 200 of the nonlinear static model includes an adjustment-side feedback circuit (left part in FIG. 6) and a congestion-side feedback circuit (right part in FIG. 6).
  • the adjustment-side feedback circuit determines the difference between the input adjustment stimulus AS and the fed back adjustment response AR (corresponding to the adjustment error AE), the adjustment-side threshold operator 35a, the adjustment-side control gain 32a, and the adjustment tension 36a. And calculation using the input 37va from the congestion side, and the result is fed back as an adjustment response AR.
  • the congestion-side feedback circuit calculates a difference between the input congestion stimulus VS and the fed back congestion response VR (corresponding to the congestion error VE), a congestion-side threshold operator 35v, a congestion-side control gain 32v, and tension congestion.
  • the calculation using 36v and the input 37av from the adjusting side is performed, and the result is fed back as the congestion response VR.
  • the adjustment feedback circuit and the convergence feedback circuit are adjusted to each other by the congestion adjustment 38va and the adjustment congestion 38av, and the adjustment response AR and the congestion response VR taking into consideration the adjustment and the congestion are calculated.
  • the convergence adjustment operator 33va multiplies the output of the convergence side control gain 32v by a parameter proportional to the convergence adjustment 38va and outputs the result to the adjustment side.
  • the adjustability congestion operator 33av multiplies the output of the adjustment side control gain 32a by a parameter proportional to the adjustability congestion 38av and outputs the result to the congestion side.
  • the adjustment-side threshold operator 35a When the control stimulus AS is input, the difference between the control stimulus AS and the control response AR is obtained, and the control error AE is output.
  • the adjustment-side threshold operator 35a outputs 0 when the magnitude of the adjustment error AE is smaller than the threshold value AT, and in other cases, the adjustment-side threshold operator 35a has a value, for example, in a monotonically increasing relationship according to the magnitude of the adjustment error AE. Is output.
  • the threshold value AT is determined based on the depth of focus of the eye. Hereinafter, it is assumed that the adjustment-side threshold operator 35a outputs AE-AT when AE> AT and AE + AT when AE ⁇ AT, with the threshold value AT being a positive value.
  • the adjustment-side control gain 32a is a gain with respect to the adjustment error AE, and increases the output of the adjustment-side threshold operator 35a to a predetermined several times to several tens of times and outputs it.
  • the output of the adjustment side control gain 32a is obtained by adding the input 37va from the convergence side and the adjustment tension 36a and returning the calculation result as an adjustment response AR to the input on the adjustment side.
  • the adjustment tension 36a (hereinafter also referred to as TA) corresponds to an adjustment amount when there is no visual stimulus.
  • the congestion-side threshold operator 35v outputs 0 when the magnitude of the congestion error VE is smaller than the threshold VT, and otherwise, for example, a value in a monotonically increasing relationship according to the magnitude of the congestion error VE. Is output.
  • the threshold value VT is determined based on the fusion limit value. In the following, it is assumed that the threshold value VT is a positive value, and the congestion-side threshold operator 35v outputs VE ⁇ VT when VE> VT, and VE + VT when VE ⁇ VT.
  • the congestion side control gain 32v is a gain with respect to the congestion error, and increases the output of the congestion side threshold operator 35v to a predetermined several tens to several hundreds of times and outputs it.
  • the output of the congestion side control gain 32v is obtained by adding the input 37av from the adjustment side and the tension congestion 36v, and returning the calculation result to the congestion side input as a congestion response VR.
  • the tension congestion 36v (hereinafter also referred to as TV) corresponds to the amount of congestion when there is no visual stimulus.
  • the adjustment error AE at this time is expressed by the following equation (1).
  • the adjustment-side control gain 32a is AG
  • the convergence-side control gain 32v is VG
  • the convergence adjustment 38va is AC / A.
  • the symbol “ ⁇ ” is based on the fact that the adjustment error AE is classified depending on whether the adjustment side threshold operator 35a is on the plus side or the minus side.
  • the congestion response VE in the equation (1) is expressed by the following equation (2). ...
  • the adjustability congestion 38av is CA / C.
  • the symbol “ ⁇ ” is classified according to whether the congestion error VE is positive or negative of the convergence threshold operator 35v.
  • the adjustment error AE and the convergence error VE are obtained by appropriately dividing the simultaneous equations of the above equations (1) and (2) into cases.
  • a known value based on an actual measurement value or age of a spectacle lens wearer can be used.
  • FIG. 7 is a graph showing the relationship between the regulatory stimulus AS (horizontal axis) and the regulatory response AR (vertical axis).
  • the adjustment stimulus AS on the horizontal axis corresponds to the actual distance to the object
  • the solid line indicates the case where the adjustment stimulus AS and the adjustment response AR match.
  • FIG. 7A shows a case where near vision correction is not performed. As the age of the subject increases to 40 years old, 50 years old, and 60 years old, the difference between the regulatory stimulus AS and the regulatory response AR becomes larger. This indicates that the object cannot be focused.
  • FIG. 7B shows a case where near vision correction of 2.00 D is performed, and the refractive power of the lens is added to the value on the vertical axis. It can be confirmed that the distance between the control stimulus AS and the control response AR is reduced by the near vision correction, and the easy-to-see distance is changed.
  • step S2005 is ended, and the process proceeds to step S2007.
  • the stimulus calculation unit 23 calculates the position where the line of sight passes through the spectacle lens 7 of the wearer when viewing the target object again, and the adjustment response AR again. Etc., and may be optimized recursively.
  • the visual acuity calculation unit 25 calculates visual acuity when viewing the target object 5 at a predetermined position by the ray tracing method using the spectacle lens model and the eyeball model based on the calculated adjustment response AR. For example, the visual acuity calculation unit 25 calculates the point image intensity on the retina from one point of the visual acuity calculation pattern (eg, Landolt ring or striped pattern) at the predetermined position from the adjustment response AR, the spectacle lens model, and the eyeball model. The distribution is calculated by ray tracing. Then, convolution integration between the point image intensity distribution and the pattern for visual acuity calculation is performed to obtain a retinal image.
  • the visual acuity calculation unit 25 calculates visual acuity when viewing the target object 5 at a predetermined position by the ray tracing method using the spectacle lens model and the eyeball model based on the calculated adjustment response AR. For example, the visual acuity calculation unit 25 calculates the point image intensity on the retina from one point of the visual a
  • the visual acuity calculation unit 25 compares the contrast of the obtained retinal image with a known contrast sensitivity to determine whether it can be identified by the size of the pattern, and calculates visual acuity from the determination result. Since the point image intensity distribution on the retina changes depending on the value of the adjustment response AR, it is possible to calculate the visual acuity in consideration of the adjustment power during binocular vision.
  • step S2007 ends, the process proceeds to step S2009.
  • step S2009 if the visual acuity calculation unit 25 has calculated visual acuity when looking at an object in all desired distances and desired directions, an affirmative determination is made in step S2009 and the process proceeds to step S2011. In other cases, the visual acuity calculation unit 25 makes a negative determination in step S2009 and returns to step S2003.
  • step S2011 the visual acuity calculation unit 25 calculates a parameter for evaluating the temporarily designed spectacle lens 7 based on the calculated visual acuity.
  • the visual acuity calculation unit 25 uses, for example, the area on the lens surface of the spectacle lens 7 in which the visual acuity is in a certain range, among the visual acuities projected and distributed at positions where the line of sight on the spectacle lens passes, as an evaluation parameter. can do.
  • step S2011 ends, the process proceeds to step S1007.
  • the following operational effects can be obtained.
  • the visual acuity with respect to the object 5 in a predetermined distance and in a predetermined direction when viewed through the spectacle lens 7 is changed by adjustment due to convergence and change in convergence by adjustment. Based on and. Thereby, taking into consideration adjustment and convergence, an accurate visual acuity value when the wearer wears the spectacle lens 7 can be obtained.
  • the adjustment change due to the convergence uses the convergence adjustment 38va, and the change in the convergence due to the adjustment uses the adjustment convergence 38av.
  • the value of visual acuity can be efficiently obtained based on the model 200 using the correlation between the adjustment and the convergence.
  • the accommodation vergence 38av and the vergence adjustment 38va can use actual values of the spectacle lens 7 wearer or numerical values based on the age of the wearer. Thereby, the value of visual acuity can be obtained using the values of the adjustability convergence 38av and the convergence adjustment 38va suitable for the wearer.
  • the visual acuity is calculated based on the adjustment-side control gain 32a, the convergence-side control gain 32v, the adjustment tension 36a, or the tension convergence 36v, and the adjustment-side control gain 32a, As the convergence-side control gain 32v, the adjustment tension 36a, and the tension convergence 36v, an actual measurement value of the wearer of the spectacle lens 7 or a numerical value based on the age of the wearer is used. Thereby, the value of visual acuity can be obtained using the constants of the model used for the evaluation of the spectacle lens suitable for the wearer.
  • the spectacle lens evaluation method of the present embodiment based on the non-linear static model in which the adjustment response AR is derived based on the difference between the adjustment response AR and the adjustment stimulus AS and the convergence adjustment 38 va.
  • An adjustment response AR with respect to the object 5 in a predetermined distance and a predetermined direction when viewed through the spectacle lens 7 is calculated, and binocular visual acuity is calculated based on the calculated adjustment response AR.
  • the visual acuity with respect to the object of various distances and directions when the wearer wears the spectacle lens 7 can be calculated based on the influence on the adjustment of the convergence.
  • the congestion is based on a non-linear static model in which the congestion response VR is derived based on the difference between the congestion response VR and the congestion stimulus VS and the adjustable congestion 38av.
  • the change in the regulatory response AR due to the sexual regulation 38va is calculated.
  • the visual acuity can be accurately calculated in consideration of the influence of the adjustment on the congestion and the influence on the adjustment of the congestion.
  • the adjustment stimulus AS and the distance between the pupils of the wearer of the spectacle lens 7, the predetermined distance, the predetermined direction, and the shape and refractive index of the spectacle lens 7 The convergence stimulus VS is calculated, and the binocular visual acuity is calculated by ray tracing from the calculated adjustment response AR. Thereby, the visual acuity with respect to the object of various distances and directions can be calculated.
  • binocular visual acuity is calculated based on the position of the spectacle lens 7 when the wearer of the spectacle lens 7 wears it. Thereby, the visual acuity can be calculated more accurately based on the position where the spectacle lens 7 of the wearer is worn.
  • the adjustment response AR and the like are calculated using a nonlinear static model related to vision.
  • the adjustment response AR or the like may be calculated using a linear static model or the like other than the nonlinear static model. Thereby, it is possible to appropriately calculate the visual acuity according to the calculation amount and the characteristics of the model.
  • FIG. 8 is a feedback circuit diagram 300 of the linear static model.
  • the adjustment-side threshold operator 35a and the convergence-side threshold operator 35v are omitted. Thereby, it is not necessary to set the threshold value AT and the threshold value VT, and the amount of calculation can be reduced.
  • the same parts as those in the feedback circuit diagram 200 of the nonlinear static model in the linear static model feedback circuit diagram 300 are referred to by the same reference numerals, and the description thereof will be omitted.
  • the present invention is not limited to the contents of the above embodiment.
  • Other embodiments conceivable within the scope of the technical idea of the present invention are also included in the scope of the present invention.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Analytical Chemistry (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Evolutionary Computation (AREA)
  • Geometry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Eyeglasses (AREA)
  • Eye Examination Apparatus (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

Un procédé d'évaluation de verre de lunettes consiste à calculer, sur la base de l'accommodation de convergence, l'acuité visuelle par rapport à un objet à une distance prescrite dans une direction prescrite lorsqu'elle est vue à travers des verres de lunettes, et à évaluer des verres de lunettes sur la base de l'acuité visuelle ainsi calculée.
PCT/JP2017/039344 2016-10-31 2017-10-31 Procédé d'évaluation de verre de lunettes, procédé de conception de verre de lunettes, procédé de fabrication de verre de lunettes et dispositif d'évaluation de verre de lunettes WO2018079835A1 (fr)

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JP2016213630A JP2020003510A (ja) 2016-10-31 2016-10-31 眼鏡レンズの評価方法、眼鏡レンズの設計方法および眼鏡レンズの製造方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020156664A (ja) * 2019-03-26 2020-10-01 株式会社トプコン 眼科装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11309114A (ja) * 1998-04-28 1999-11-09 Canon Inc 検眼装置
JP2005021181A (ja) * 2003-06-30 2005-01-27 Nidek Co Ltd 眼調節機能測定装置
WO2012014810A1 (fr) * 2010-07-27 2012-02-02 Hoya株式会社 Procédé d'évaluation de verre de lunettes, procédé de conception de verre de lunettes, procédé de fabrication de verre de lunettes, et verre de lunettes
WO2015150432A1 (fr) * 2014-04-03 2015-10-08 Essilor International (Compagnie Generale D'optique) Procédé de fabrication d'une lentille ophtalmique progressive personnalisée

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11309114A (ja) * 1998-04-28 1999-11-09 Canon Inc 検眼装置
JP2005021181A (ja) * 2003-06-30 2005-01-27 Nidek Co Ltd 眼調節機能測定装置
WO2012014810A1 (fr) * 2010-07-27 2012-02-02 Hoya株式会社 Procédé d'évaluation de verre de lunettes, procédé de conception de verre de lunettes, procédé de fabrication de verre de lunettes, et verre de lunettes
WO2015150432A1 (fr) * 2014-04-03 2015-10-08 Essilor International (Compagnie Generale D'optique) Procédé de fabrication d'une lentille ophtalmique progressive personnalisée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YAGO, KEIKO: "Basis and Practice of Accommodation", JAPANESE ASSOCIATION OF CERTIFIED ORTHOPTISTS, vol. 20, 1992, pages 4 - 10 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020156664A (ja) * 2019-03-26 2020-10-01 株式会社トプコン 眼科装置
JP7265903B2 (ja) 2019-03-26 2023-04-27 株式会社トプコン 眼科装置

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