WO2012127882A1 - コンタクトレンズおよびその製造方法 - Google Patents
コンタクトレンズおよびその製造方法 Download PDFInfo
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- WO2012127882A1 WO2012127882A1 PCT/JP2012/002055 JP2012002055W WO2012127882A1 WO 2012127882 A1 WO2012127882 A1 WO 2012127882A1 JP 2012002055 W JP2012002055 W JP 2012002055W WO 2012127882 A1 WO2012127882 A1 WO 2012127882A1
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- spherical aberration
- contact lens
- user
- optical
- aberration
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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
- G02C7/04—Contact lenses for the eyes
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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
- G02C7/024—Methods of designing ophthalmic lenses
- G02C7/027—Methods of designing ophthalmic lenses considering wearer's parameters
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/22—Correction of higher order and chromatic aberrations, wave front measurement and calculation
Definitions
- the present invention relates to a contact lens worn by the human eye, and more particularly to a contact lens having a novel structure capable of improving QOV (quality of appearance) and a manufacturing method thereof.
- the human eye may have defects in optical properties such as regulation ability due to genetics, environment, aging, disease, and the like. In such a case, problems such as refractive errors occur and it becomes difficult to obtain a good appearance.
- correction lenses such as contact lenses and eyeglasses have been conventionally used.
- the conventional correction lens has an effective correction effect for myopia, hyperopia, presbyopia, and astigmatism, as can be seen from the fact that its optical characteristics are specified by the spherical lens power, cylindrical lens power, and cylindrical lens axial direction. However, it was not a countermeasure against residual irregular astigmatism.
- Patent Document 1 In order to eliminate such residual irregular astigmatism, Japanese Patent Publication No. 2004-526985 (Patent Document 1) measures high-order aberrations present in the user's eyes and cancels such high-order aberrations to zero. It is proposed to prescribe a correction lens in which higher-order aberrations having opposite sign values are set.
- Patent Document 1 as described in [0016] and the like, an optical characteristic that simply cancels (sets to zero) high-order aberrations is simply given to the lens, which is ideal. Although it may be, practical application is extremely difficult. That is, in addition to various high-order aberrations in the human eye, coma aberration, which has a large adverse effect on visual quality (QOV), has different optical characteristics around the optical axis.
- the correction lens set with the higher order aberrations must be a custom-made product, and not only its design but also its manufacture is extremely difficult and unrealistic.
- Patent Document 2 JP-T-2006-517676 (Patent Document 2) describes the degree of influence on QOV for high-order aberrations of respective orders represented by Zernike polynomials. It is described that a high-order aberration of an order important for improving the QOV is specified using a chart obtained by actually measuring and a correction lens is provided that cancels the specified high-order aberration to zero.
- Patent Document 2 as described in [0097] to [0099] and the like, only specific high-order aberrations that adversely affect the appearance are selected, and the selected specific high-order aberrations are selected. It is only intended to provide a correction lens that cancels out to zero.
- Patent Document 2 when it is intended to provide a correction lens in which a plurality of higher-order aberrations are symmetric and all these higher-order aberrations are canceled out to zero, Since the manufacturing is extremely complicated and custom-made is required, the same problem as in Patent Document 1 is unavoidable that the practicality is poor.
- providing a correction lens that cancels only one high-order aberration (for example, spherical aberration) and eliminates it will greatly reduce the adverse effects of other remaining high-order aberrations (for example, coma aberration). It was difficult to realize.
- Patent Document 3 a new structure capable of dealing with residual irregular astigmatism with simple optical characteristics.
- Proposed contact lenses The present invention has a technical idea that is different from the contact lens described in Patent Document 1, which is the prior application, and is capable of dealing with residual irregular astigmatism at a practical level to improve the quality of view (QOV).
- QOV quality of view
- the present invention provides a contact lens having a new and useful structure and a method for manufacturing the same.
- the present invention has been made in the background as described above, and the solution is to improve the quality of view (QOV) effectively and to suit each user. It is an object of the present invention to provide a contact lens having a novel structure that is easy to use and highly practical, and a method for manufacturing the same.
- (a) setting of optical characteristics is set so that spherical aberration of a size corresponding to the coma of the user's naked eye and remaining without canceling the spherical aberration of the user's naked eye is set in the optical unit.
- a lens shape setting step for determining a lens shape of an optical unit provided with the spherical aberration set in the optical property setting step as a correction optical property for residual irregular astigmatism in the user's naked eye.
- the present invention is based on the premise that a coma aberration is allowed to remain in the eyes of a contact lens user (hereinafter referred to as a user). This is completely different from the concept of “setting the coma of the opposite sign value so that the coma is canceled out to zero”.
- a countermeasure against coma that adversely affects the quality of appearance spherical aberration of a size corresponding to coma that exists in the human eye is actively given to the human eye using contact lenses. This reduces the decrease in QOV caused by coma aberration.
- the present invention pays attention to coma among high-order aberrations in improving visibility, and a spherical surface having a size corresponding to coma without giving correction optical characteristics that cancel coma. This is based on a new finding that the appearance can be improved by giving aberration as a correction optical characteristic.
- Patent Documents 1 and 2 in order to suppress deterioration in appearance due to high-order aberrations, the conventional technical idea of simply canceling all or specific high-order aberrations to zero is used. As long as it is based, it is inevitable that the design and manufacture become extremely difficult to improve the appearance.
- the spherical aberration that is adopted as the correction optical characteristic and applied to the lens is an optical characteristic corresponding to the coma aberration to the last, and therefore, the coma aberration is not canceled out to zero.
- the ability to effectively deal with coma aberration, which has a large adverse effect on QOV, by setting spherical aberration to the contact lens has great significance in manufacturing, handling, wearing, etc. of the contact lens, which is an embodiment of the invention.
- a rotationally asymmetric complicated optical characteristic and lens surface shape are set for the contact lens.
- a contact lens having a structure according to the present invention is formed with spherical aberration, which is a rotationally symmetric optical characteristic around the optical axis, among high order aberrations. This eliminates the need for accurate circumferential position setting, facilitates manufacture and handling, and facilitates practical application.
- the present invention has found that the insufficient QOV due to coma in the human eye can be reduced by using spherical aberration, and in addition, the setting of spherical aberration in the contact lens is a higher order aberration of the contact lens. Focusing on the fact that the characteristics can be made rotationally symmetric, they have been completed by combining them with each other. Then, according to the present invention completed based on such a new basic idea, a reduction in QOV caused by coma aberration, which is a kind of higher-order aberration, which has been extremely difficult to implement practically in the past. Thus, a novel contact lens capable of giving a good QOV can be provided with sufficient practicality from the viewpoint of manufacturing and wearing.
- the present invention it is effective to positively give spherical aberration to the eye optical system by a contact lens in order to cope with a decrease in QOV due to coma existing in the human eye.
- This is also objectively recognized by comparing the example and the comparative example in the embodiment.
- the spherical depth of focus increases at least the subjective depth of focus.
- the effect of improving the QOV exhibited by the contact lens according to the present invention is apparent from the example data described later.
- the spherical aberration in the contact lens according to the present invention is set to a size corresponding to the coma aberration in the user's naked eye (eye without wearing the contact lens), and the coma aberration is large. If the coma aberration is small, the spherical aberration is set to be small.
- the spherical aberration having a magnitude corresponding to the coma of the user is evaluated by the user's eye optical system when the contact lens is worn.
- the total amount of the spherical aberration of the naked eye and the spherical aberration given by the contact lens has a size substantially corresponding to the coma aberration of the user's naked eye.
- the spherical aberration of the contact lens is set.
- the specific correspondence between the coma and spherical aberration in the eye optical system when the contact lens is worn does not need to be optimal, and only the objective optical characteristics of the eye for the user.
- the person skilled in the art can respond by making decisions based on the user's opinions and objective measurement information.
- the present invention is not accompanied by difficulty that is impractical in the practice of the present invention.
- the present invention in order to make it possible to more easily and quickly determine spherical aberration, it is effective to narrow the selection range of spherical aberration.
- the optical characteristic selection technique to be used is preferably employed.
- the spherical aberration (RMS value) of the contact lens according to the present invention so as to satisfy the following expression.
- the RMS value is a value (unit: ⁇ m) obtained by quantifying (displayed as a root mean square) wavefront aberration in the pupil region of the human eye optical system using a wavefront aberration analyzer (wavefront sensor).
- a wavefront aberration analyzer wavefront sensor
- the spherical aberration of the naked eye is 0.23
- the optical characteristics of the human eye tend to change with aging. Therefore, for example, coma aberration existing in the naked eye of the user can be estimated according to the age of the user based on optical characteristics of eye tissues such as the cornea and the crystalline lens.
- the spherical aberration (RMS value) set for the contact lens of the present invention is set based on the following formula using the patient age corresponding to the coma aberration as an index. Is also effective in obtaining a good QOV.
- Contact lens spherical aberration A + B x User age -0.33 ⁇ A ( ⁇ m) ⁇ -0.03 0.003 ⁇ B ( ⁇ m) ⁇ 0.004
- the setting of the spherical aberration of the contact lens based on the above formula may not be suitable.
- a special aspherical intraocular lens in which the user is an intraocular lens inserter, and the intraocular lens has a correction optical characteristic of spherical aberration in the human eye, and the spherical aberration of the naked eye is zero it is effective to adopt the following formula instead of the above formula.
- Contact lens spherical aberration A + B ⁇ user age ⁇ 0.10 ⁇ A ( ⁇ m) ⁇ 0.20 0.003 ⁇ B ( ⁇ m) ⁇ 0.004
- the present inventor has studied and found that the same age as the contact lens user From the measurement data of the optical characteristics of the human eye in the population of the layer, the spherical aberration of the contact lens that can give a good QOV to the user can be obtained, or the suitability of the determined spherical aberration can be determined. I found it possible. That is, a spherical aberration having a magnitude obtained by subtracting the spherical aberration in the human eye (naked eye) of the user from the average value of the measurement data of the spherical aberration of the human eye in the population of the same age group as the user. It is effective to obtain a good QOV by using a contact lens set as a spherical aberration having a magnitude corresponding to the coma aberration present in the eyes of a person.
- low-order aberrations may not be set in the contact lens according to the present invention.
- Such a contact lens in which only spherical aberration, which is a high-order aberration, is set is a person who has only a QOV problem due to high-order aberration without having low-order aberration in the naked eye due to, for example, insertion of an intraocular lens.
- the QOV can be improved.
- low-order aberrations such as spherical lens power and cylindrical lens power may be set in addition to spherical aberration which is one of high-order aberrations in the optical unit.
- contact lenses with low-order aberrations are also used for those who have QOV problems due to high-order aberrations as well as refractive errors such as myopia, hyperopia, presbyopia, and astigmatism. Further improvement of QOV can be effectively achieved with one contact lens simultaneously with correction of abnormality.
- a mode in which the optical characteristics of the optical part are rotationally symmetric around the optical axis is suitably employed.
- the optical characteristics that combine low-order aberrations in addition to high-order aberrations rotationally symmetric around the optical axis it is possible to further improve the practicality by making the manufacturing and wearing operations easier. I can do it.
- the lens shape is rotationally symmetric about the geometric center axis set on the optical axis.
- prism ballast is used.
- Well-known circumferential positioning means such as slab-off and the like are employed.
- the present invention provides a spherical aberration having a size corresponding to the coma aberration of the user's naked eye and remaining without canceling out the spherical aberration of the user's naked eye, against residual irregular astigmatism in the user's naked eye.
- a contact lens that is set in the optical part as correction optical characteristics and in which higher-order aberrations in the optical part are rotationally symmetric around the optical axis is also characterized.
- the contact lens having such a structure can give a good QOV to a patient, and can be easily realized in design and manufacture. It becomes easy to provide and put to practical use.
- Such a contact lens having a structure according to the present invention is preferably manufactured by the above-described method of the present invention.
- each of the preferable modes described in the description of the manufacturing method described above can be applied to the contact lens according to the present invention as far as possible in terms of configuration.
- design is performed by applying spherical aberration, which is a rotationally symmetric optical characteristic around the optical axis, to improve QOV for coma aberration that has a large adverse effect on QOV but is difficult to cancel.
- spherical aberration which is a rotationally symmetric optical characteristic around the optical axis
- FIG. 3 is a longitudinal sectional view of a human eye wearing the contact lens shown in FIG. 1.
- FIG. 1 is a longitudinal sectional view of a human eye wearing the contact lens shown in FIG. 1.
- FIG. 7 is a simulation optical image showing how the contact lenses as the first to fifth embodiments of the present invention are applied to the human eye of the same user together with Comparative Example 1 in which spherical aberration is zero.
- FIG. 10 is a simulated optical image showing the appearance of the contact lens as the sixth to eighth embodiments of the present invention when applied to the human eye of the same user together with Comparative Example 2 in which spherical aberration is zero.
- FIG. 1 shows a contact lens 10 as an embodiment of the present invention.
- the present invention can be applied to both soft contact lenses and hard contact lenses, the following embodiments will be described as soft contact lenses.
- the contact lens 10 has a basic shape that is conventionally known as a soft contact lens. That is, the contact lens 10 has a spherical shell shape as a whole, and is worn over the cornea 14 of the human eye 12 as shown in FIG.
- An optical unit 16 that provides optical characteristics is provided.
- the optical unit 16 is a circular region in a front view with the geometric center axis and optical axis (optical center axis) of the contact lens 10 as the lens center axis 18, and the optical unit 16 is disposed on the outer periphery of the optical unit 16.
- a peripheral portion 20 that surrounds and expands in an annular shape is provided.
- the outer peripheral edge portion of the peripheral portion 20 is an edge portion 22 that connects the front and back surfaces of the contact lens 10.
- the base curve (BC), lens diameter (DIA), and the like of the contact lens 10 are appropriately set in consideration of the curvature radius of the cornea and the pupil diameter of the user.
- the optical unit 16 has a spherical lens power of an appropriate size for correcting the degree of myopia, hyperopia, astigmatism, etc. of the user in the same manner as conventionally known vision correction contact lenses.
- the cylindrical lens power can be set in an appropriate manner according to the user, in the present invention, the setting of the optical characteristics of low-order aberrations such as the spherical lens power is arbitrary and not essential.
- the material of the contact lens 10 is not limited in the present invention, and may be formed using a conventionally known soft contact lens material such as PHEMA, PVP, or silicone hydrogel.
- spherical aberration which is one of higher order aberrations is positively given to the optical unit 16.
- This spherical aberration is set to a magnitude corresponding to the value of coma aberration present in the contact lens user's naked eye and to remain without canceling out the spherical aberration of the user's naked eye.
- the coma aberration is approximately the same as the spherical aberration.
- the spherical aberration in the contact lens 10 is set.
- the manufacturing method of the contact lens 10 in this embodiment is comprised including the setting process of an optical characteristic.
- the coma aberration in the user's eye optical system wearing the contact lens 10 is coma aberration in the naked eye optical system of the user not wearing the contact lens 10. be equivalent to.
- each aberration is expressed as a value represented by the root mean square of the amount of deviation of the actual wavefront in the light ray direction with respect to the ideal wavefront orthogonal to the light ray.
- the magnitude of the spherical aberration of the contact lens 10 can be set in accordance with the magnitude of the coma aberration existing in the user's naked eye, the coma aberration existing in the naked eye is specified separately in the cornea 14 and the crystalline lens 24. There is no need.
- the magnitude of the coma that exists in the naked eye is determined by, for example, C 3 1 (lateral coma) and C 3 ⁇ in the Zernike polynomial obtained by performing wavefront aberration analysis using a known wavefront sensor such as Shack-Hartmann type.
- the coma aberration of the cornea 14 can be obtained from the shape and thickness of the cornea 14 obtained based on the measured values of the cornea topography obtained by, for example, a refractometer, and the coma aberration value of the whole naked eye. And the coma aberration value of the cornea 14 can also be used to determine the coma aberration of the crystalline lens 24.
- the spherical aberration existing in the user's naked eye is mostly due to the respective optical characteristics of the cornea 14 and the crystalline lens 24 like the coma aberration, and can be measured using a known wavefront sensor or the like.
- C 4 0 term in the Zernike polynomials obtained by subjecting the wavefront aberration analysis is a spherical aberration.
- the value of the spherical aberration to be set in the contact lens 10 can be obtained based on the following equation.
- a preferable setting range (RMS value) of the spherical aberration in the optical unit 16 of the contact lens 10 set in the optical characteristic setting step described above can be expressed by the following equation.
- coma and spherical aberration in the human eye both increase substantially linearly with age as shown in FIG.
- the coma and spherical aberration in the human eye are close to each other, but do not match.
- the preferable setting range (RMS value) of spherical aberration in the optical unit 16 of the contact lens 10 set in the above-described optical characteristic setting step is such that both A and B are constants. It can be expressed by a formula.
- the change in spherical aberration with aging of the cornea is not considered, and only the change in spherical aberration with aging of the cornea is considered. Should be considered.
- the coma of the entire eyeball is substantially the same as the coma of the cornea, It is considered that the coma of the eyeball hardly changes even when the lens is removed.
- the change of the spherical aberration with the aging of the cornea 14 and the crystalline lens 24 shows an aspect as shown in FIG.
- the intraocular lens put into the user has spherical aberration
- an intraocular lens is an aspherical intraocular lens having a correction optical characteristic that cancels the spherical aberration of the cornea, for example, and makes the spherical aberration in the human eye (naked eye) zero
- a preferable setting range (RMS value) of spherical aberration in the optical unit 16 of the contact lens 10 set in the optical characteristic setting step described above is expressed by the following equation in which both A and B are constants instead of the above equation. Is done.
- the value of the spherical aberration in the optical unit 16 of the contact lens 10 set in the above-described optical characteristics setting step is also preferable to set a plurality of healthy persons belonging to the same age group as the user within a specific range determined based on the optical characteristics of human eyes in such a population.
- the difference between the average value of the spherical aberration measurement data of the human eye (the naked eye optical system including the cornea and the lens) in the above population and the spherical aberration of the user's human eye (the naked eye) is applied.
- the spherical aberration having a magnitude corresponding to the coma aberration in the user's naked eye is set in the contact lens 10. It has been found by the present inventor that the spherical aberration of the contact lens 10 set in this way is substantially equal to the spherical aberration of the healthy human eye, which is the population.
- the spherical aberration determined in consideration of coma and spherical aberration existing in the naked eye of the contact lens user that is, the spherical aberration set in the optical characteristic setting step described above.
- the lens shape setting step for determining the optical characteristics (lens shape) in the optical section 16 of the target contact lens 10 is performed by setting the correction optical characteristics for the residual irregular astigmatism in the user's naked eye.
- the specific shape of the contact lens (the shape of the lens front and rear surfaces that serve as the refractive surface) is, for example. It is possible to set using various known lens design software using a ray tracing method based on Snell's law.
- low-order aberrations such as spherical lens power and cylindrical lens power to correct it are also considered. Is set.
- the lens-shaped optical unit 16 based on the design information determined in the lens shape setting step uses the lens material as described above to form a lens by a known molding method, spin casting method, race cutting method, or the like.
- the contact lens 10 formed by the process and having the target optical characteristics is manufactured.
- the contact lens 10 manufactured in this way has the lens center axis 18 as the center of rotation in the optical characteristic setting step described above, at least with respect to high-order aberrations, preferably with respect to the whole including low-order aberrations and high-order aberrations.
- a rotationally symmetric optical characteristic is set in the optical unit 16 as an axis.
- the contact lens 10 does not have asymmetric optical characteristics in the circumferential direction around the lens central axis 18 such as coma aberration, a general assumption is made that a uniform lens material is adopted.
- the shapes of the lens front surface and the back surface also have a rotating body shape with the lens center axis 18 as the rotation center axis.
- At least one of spherical lens power and cylindrical lens power Is preferably set.
- the cylindrical lens power the optical characteristics and the lens surface shape are not rotationally symmetric around the lens central axis 18, but the design and manufacture of low-order aberrations is an established technique and is easy. Manufacture and handling do not become extremely difficult by setting the frequency.
- the contact lens 10 having the structure according to the present invention can be easily designed and manufactured without particular consideration of circumferential positioning at any stage of manufacturing, handling, wearing, etc. It becomes possible.
- FIG. 6 is a simulation result when a contact lens having a structure according to the present invention is applied to a 60-year-old user.
- Such simulation is performed by using optical design software ZEMAX (trade name, manufactured by Zemax Development Corp., USA) as an eyeball model of a 60-year-old general person (person with statistical average optical characteristics).
- An ophthalmic optical system corresponding to an optical region corresponding to a pupil of 6 mm is constructed with a construction (with the amount of longitudinal coma of the C 3 ⁇ 1 term in the Zernike polynomial) of 0.24 ⁇ m and wearing a contact lens according to the present invention.
- the optical characteristics of the system were evaluated with a simulated optical image of the Landolt ring. In this eyeball model, low-order aberrations such as myopia and astigmatism do not exist.
- Comparative Example 1 in accordance with the conventional idea that it is desirable to make the spherical aberration zero, for example, by inserting a contact lens that cancels the spherical aberration of the naked eye and makes the spherical aberration zero with the naked eye, etc.
- the model of spherical aberration corresponds to the case where a zero.
- each of Examples 1 to 5 corresponds to a case where a contact lens having an optical characteristic in which spherical aberration is positively adjusted and set according to the present invention is worn.
- Example 3 corresponds to the case where the spherical aberration of the contact lens is set in consideration of the coma and spherical aberration of the naked eye so that the spherical aberration having the same RMS value as the coma aberration is set in the eyeball model.
- FIG. 7 is a simulation result when a contact lens having a structure according to the present invention is worn on an eyeball model of a 20-year-old general person.
- the coma aberration (the amount of longitudinal coma in the C 3 ⁇ 1 term in the Zernike polynomial) is 0.14 ⁇ m as a 20-year-old general eyeball model using ZEMAX.
- the contact lens according to the present invention worn the optical characteristics of the eye optical system corresponding to the optical region corresponding to the pupil 6 mm were obtained and the appearance was evaluated by obtaining a simulated optical image of the Landolt ring. It is a thing.
- Comparative Example 2 corresponds to the case where the spherical aberration of the eye optical system is set to zero according to the conventional idea that it is desirable to set the spherical aberration to zero, as in Comparative Example 1.
- each of Examples 6 to 8 corresponds to a case where a contact lens having an optical characteristic that is set by positively adjusting the spherical aberration of the eye optical system is worn according to the present invention.
- Example 7 spherical aberration having an RMS value substantially the same as the coma aberration of the eye optical system is realized by the contact lens.
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Abstract
Description
(使用者の裸眼のコマ収差-使用者の裸眼の球面収差-0.10μm)≦コンタクトレンズの球面収差≦(使用者の裸眼のコマ収差-使用者の裸眼の球面収差+0.10μm)
(使用者の裸眼のコマ収差-0.33μm)≦コンタクトレンズの球面収差≦(使用者の裸眼のコマ収差-0.13μm)
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.33≦A(μm)≦-0.03
0.003≦B(μm)≦0.004
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.25≦A(μm)≦0.05
0.003≦B(μm)≦0.004
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.10≦A(μm)≦0.20
0.003≦B(μm)≦0.004
コンタクトレンズの球面収差≦使用者の裸眼のコマ収差-使用者の裸眼の球面収差+0.10μm
-0.33≦A(μm)≦-0.03
0.003≦B(μm)≦0.004
-0.25≦A(μm)≦0.05
0.003≦B(μm)≦0.004
-0.10≦A(μm)≦0.20
0.003≦B(μm)≦0.004
Claims (16)
- 使用者の裸眼のコマ収差に対応した大きさで且つ該使用者の裸眼の球面収差を相殺しないで残存させる大きさの球面収差を光学部に設定する光学特性の設定工程と、
該光学特性の設定工程で設定された該球面収差を、該使用者の裸眼における残余不正乱視に対する矯正光学特性として付与した光学部のレンズ形状を決定するレンズ形状の設定工程と、
該レンズ形状の設定工程で決定されたレンズ形状の光学部を形成することにより、該光学部における高次収差が光軸回りで回転対称とされた光学特性を有するコンタクトレンズを形成するレンズの形成工程と
を、含むことを特徴とするコンタクトレンズの製造方法。 - 前記光学特性の設定工程において、
前記光学部に設定される前記球面収差を、
下式の何れも満足するRMS値をもって設定する請求項1に記載のコンタクトレンズの製造方法。
コンタクトレンズの球面収差 ≧ 使用者の裸眼のコマ収差-使用者の裸眼の球面収差-0.10μm
コンタクトレンズの球面収差 ≦ 使用者の裸眼のコマ収差-使用者の裸眼の球面収差+0.10μm - 前記光学特性の設定工程において、
前記光学部に設定される前記球面収差を、
A,Bの何れも定数とする下式を満足するRMS値をもって設定する請求項1又は2に記載のコンタクトレンズの製造方法。
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.33≦A(μm)≦-0.03
0.003≦B(μm)≦0.004 - 前記コンタクトレンズが、人眼における球面収差の補正光学特性を有しない球面型眼内レンズを挿入した使用者に適用されるものであり、
前記光学特性の設定工程において、
前記光学部に設定される前記球面収差を、
A,Bの何れも定数とする下式を満足するRMS値をもって設定する請求項1又は2に記載のコンタクトレンズの製造方法。
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.25≦A(μm)≦0.05
0.003≦B(μm)≦0.004 - 前記コンタクトレンズが、人眼における球面収差の補正光学特性を有する非球面型眼内レンズを挿入した使用者に適用されるものであり、
前記光学特性の設定工程において、
前記光学部における前記前記球面収差を、
A,Bの何れも定数とする下式を満足するRMS値をもって設定する請求項1又は2に記載のコンタクトレンズの製造方法。
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.10≦A(μm)≦0.20
0.003≦B(μm)≦0.004 - 前記光学特性の設定工程において、
前記光学部における前記球面収差を、
前記使用者と同じ年齢層の母集団における人眼の球面収差の測定データの平均値と該使用者の人眼の球面収差との差をもって設定する請求項1~5の何れか1項に記載のコンタクトレンズの製造方法。 - 前記光学特性の設定工程において、
使用者の裸眼の低次収差の視力を相殺する低次収差として、球面レンズ度数と円柱レンズ度数との少なくとも一方を、前記球面収差に併せて設定する請求項1~6の何れか1項に記載のコンタクトレンズの製造方法。 - 前記光学特性の設定工程において、
前記光学部の光学特性を、低次収差および高次収差を含む全体として、前記光軸回りで回転対称として設定する請求項7に記載のコンタクトレンズの製造方法。 - 使用者の裸眼のコマ収差に対応した大きさで且つ使用者の裸眼の球面収差を相殺しないで残存させる大きさの球面収差が、該使用者の裸眼における残余不正乱視に対する矯正光学特性として光学部に設定されていると共に、
該光学部における高次収差が光軸回りで回転対称とされていることを特徴とするコンタクトレンズ。 - 前記光学部に設定された前記球面収差が、
下式の何れも満足するRMS値をもって設定されている請求項9に記載のコンタクトレンズ。
コンタクトレンズの球面収差 ≧ 使用者の裸眼のコマ収差-使用者の裸眼の球面収差-0.10μm
コンタクトレンズの球面収差 ≦ 使用者の裸眼のコマ収差-使用者の裸眼の球面収差+0.10μm - 前記光学部に設定された前記球面収差が、
A,Bの何れも定数とする下式を満足するRMS値をもって設定されている請求項9又は10に記載のコンタクトレンズ。
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.33≦A(μm)≦-0.03
0.003≦B(μm)≦0.004 - 人眼における球面収差の補正光学特性を有しない球面型眼内レンズを挿入した使用者に適用されるコンタクトレンズであって、
前記光学部に設定された前記球面収差が、
A,Bの何れも定数とする下式を満足するRMS値をもって設定されている請求項9又は10に記載のコンタクトレンズ。
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.25≦A(μm)≦0.05
0.003≦B(μm)≦0.004 - 人眼における球面収差の補正光学特性を有する非球面型眼内レンズを挿入した使用者に適用されるコンタクトレンズであって、
前記光学部に設定された前記前記球面収差が、
A,Bの何れも定数とする下式を満足するRMS値をもって設定されている請求項9又は10に記載のコンタクトレンズ。
コンタクトレンズの球面収差 = A + B × 使用者の年齢
-0.10≦A(μm)≦0.20
0.003≦B(μm)≦0.004 - 前記光学部における前記球面収差が、
前記使用者と同じ年齢層の母集団における人眼の球面収差の測定データの平均値と該使用者の人眼の球面収差との差をもって設定されている請求項9~13の何れか1項に記載のコンタクトレンズ。 - 使用者の裸眼の低次収差の視力を相殺する低次収差として、球面レンズ度数と円柱レンズ度数との少なくとも一方が、前記球面収差に併せて前記光学部に設定されている請求項9~14の何れか1項に記載のコンタクトレンズ。
- 前記光学部の光学特性が、低次収差および高次収差を含む全体として、前記光軸回りで回転対称とされている請求項15に記載のコンタクトレンズ。
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JP2013505828A JP6192012B2 (ja) | 2011-03-24 | 2012-03-23 | コンタクトレンズの製造方法 |
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US9201250B2 (en) | 2012-10-17 | 2015-12-01 | Brien Holden Vision Institute | Lenses, devices, methods and systems for refractive error |
JP2015533430A (ja) | 2012-10-17 | 2015-11-24 | ブリエン ホールデン ビジョン インスティテュートBrien Holden Vision Institute | 屈折異常用のレンズ、デバイス、方法、及びシステム |
CN111051965B (zh) * | 2017-09-01 | 2022-03-25 | 株式会社实瞳 | 眼用镜片和使用眼用镜片的成像方法 |
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US20140098338A1 (en) | 2014-04-10 |
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