WO2007010806A1 - Lentille à puissance de réfraction progressive - Google Patents

Lentille à puissance de réfraction progressive Download PDF

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Publication number
WO2007010806A1
WO2007010806A1 PCT/JP2006/313922 JP2006313922W WO2007010806A1 WO 2007010806 A1 WO2007010806 A1 WO 2007010806A1 JP 2006313922 W JP2006313922 W JP 2006313922W WO 2007010806 A1 WO2007010806 A1 WO 2007010806A1
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WO
WIPO (PCT)
Prior art keywords
lens
power
progressive
prescription
reference point
Prior art date
Application number
PCT/JP2006/313922
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English (en)
Japanese (ja)
Inventor
Mitsuhiro Yanari
Original Assignee
Nikon-Essilor Co., Ltd.
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Filing date
Publication date
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Application filed by Nikon-Essilor Co., Ltd. filed Critical Nikon-Essilor Co., Ltd.
Priority to JP2007525964A priority Critical patent/JP5000505B2/ja
Publication of WO2007010806A1 publication Critical patent/WO2007010806A1/fr

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Classifications

    • 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
    • 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
    • G02C7/063—Shape of the progressive surface
    • G02C7/065—Properties on the principal line

Definitions

  • the present invention relates to a progressive-power lens, and more particularly, to a progressive-power lens that is used as an aid to eye accommodation.
  • a progressive-power lens is located at the upper part of the lens when worn and is suitable for far-distance viewing (hereinafter also referred to as “distance part”).
  • distance part suitable for vision
  • progressive area that is located between the distance vision area and the near vision area and continuously connects both surface refractive powers
  • the measurement reference point for measuring the lens power at the distance portion is referred to as “distance reference point”, and the measurement reference point for measuring the lens power at the near portion is referred to as “near reference point”.
  • the straight line or curve that passes through the distance reference point and the near reference point and divides the refracting surface of the progressive surface into a nose region and an ear region is called a “main gaze line”.
  • the main line of sight is used as a reference line that represents specifications such as the addition power of a progressive-power lens, and is used as an important reference line when designing a progressive surface (progressive refractive surface).
  • the spectacle lens is created by processing the prescription surface of the semi-finished lens into a spherical shape or a toric surface shape according to the spherical power or astigmatic power of the spectacle wearer.
  • the surface shape of the progressive refractive surface in a semi-finished lens is The surface shape is set so as to obtain the most preferable optical performance at a specific prescription power within the range. Therefore, if this specific power is used as the reference power of the semi-finished lens, the optical performance of the lens at the prescription power near the reference power is good, but the decrease in the optical performance is avoided as the prescription power deviates from the reference power. There was a drawback of not. However, in recent years, with the development of aspherical processing technology, it has become possible to freely process a lens surface into an aspherical shape, particularly into a complex aspherical shape such as a free-form surface within a short time.
  • the aspherical surface used for the prescription surface is generally a free-form surface having no symmetry, such as a polynomial aspherical surface, or a spline surface shape such as a bicubic spline or B-spline.
  • a double-sided aspherical progressive refraction calendar in which not only the progressive refraction surface but also the prescription surface is aspherical is disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-034 1986.
  • a progressive-power lens the power of a lens at at least one of a distance reference point and a near reference point is measured by a measuring instrument called a lens meter.
  • the prescription surface is entirely spherical or toric, so the prescription power of the wearer and the spherical power and astigmatism power measured at the measurement reference point by the lens holder There was a substantial agreement.
  • a progressive bending lens with an aspheric prescription surface that places importance on optical performance in the wearing state causes an astigmatism difference at the measurement reference point because the prescription surface is aspherical.
  • spherical power and astigmatism power different from the prescription power are displayed in the measurement with the lens meter.
  • the difference between the spherical power and astigmatism power measured by the lens unit and the prescription power of the wearer tends to increase.
  • manufacturers have introduced special lens meters that measure the frequency in the wearing state, or the frequency obtained by measuring with a general lens meter as the measurement theoretical frequency separately from the original prescription frequency. It is also written together.
  • the combination of the prescription frequency and the measurement theory frequency is called “double notation”. Actually, it is difficult to introduce a special lens meter that can measure the frequency in the wearing state in general eyeglass stores, so the measurement method using double notation is the mainstream.
  • the measurement position by the lens meter compared to a conventional progressive-power lens with a spherical or toric surface treatment surface.
  • the measurement error due to the alignment accuracy is large.
  • the difference between the prescription power displayed in double notation and the measurement theoretical power is not necessarily constant, and varies depending on various prescription conditions such as spherical power, diopter power, astigmatic axis, and addition power. Therefore, when measuring the power of a progressive power lens with double notation, it is necessary to check all the measurement theoretical powers displayed by the manufacturer for each lens. ⁇
  • the main gaze on the prescription surface is not visible in some areas of the distance portion including the main gaze that is discarded as an unnecessary part when the lens is actually processed into a frame shape. It is configured so that the same measurement power as the prescription power can be obtained by measuring the power of the lens in the area where the point difference does not occur.
  • the evaluation based on the shape of the main gazing line was important. For a double-sided aspherical progressive-power lens that focuses on optical performance and aspherics on both sides, it is found that it is not sufficient to specify the surface shape of some linear parts of the main line of sight. It was.
  • the prescription surface in order to improve the optical performance over the entire lens, also has symmetry such as a high-order polynomial or spline. No aspheric shape is required. However, since the aspherical shape without such symmetry has a high degree of surface freedom, it is not possible to specify the surface shape of the adjacent region simply by defining the surface shape on the main line of sight. In other words, even if the prescription surface on the main line of sight is set to a spherical shape, the amount of aspherical surface at a position slightly away from the main line of sight increases and the contribution to optical performance is unavoidably fluctuated. There is also.
  • the power measurement of the original lens is performed to check whether the lens has been created correctly as prescribed by the wearer. Therefore, in general spectacle lenses as well as progressive-power lenses, measurement reference points are arranged in the vicinity of the geometric center of the lens or at the most important position for wearing the lens. In other words, as described in Japanese Patent Laid-Open No.
  • the present invention has been made in view of the above-mentioned problems, and it is possible to easily perform lens power measurement by a spectacle store or a user even though the optical performance in the wearing state is improved satisfactorily.
  • An object of the present invention is to provide a progressive power lens that can be used.
  • a far-field region that is relatively suitable for far-distance viewing along a main gaze line that divides the refractive surface of the lens into a nose-side region and an ear-side region in the wearing state
  • a near vision area relatively suitable for near vision with respect to the distance vision area, and a surface refractive power of the distance vision area and the near distance between the distance vision area and the near vision area.
  • a progressive refraction calendar having a progressive area that continuously connects the surface power of the application area
  • the prescription surface formed to correct the optical performance of the transmitted light of the lens has an aspheric shape, and is generated by the surface astigmatism component generated by the prescription surface and the spherical surface or toric surface necessary for correcting the prescription power Progressive refraction characterized in that the average value of the absolute value of the difference from the surface astigmatic difference component is less than or equal to a predetermined value over a predetermined area in the vicinity including the measurement reference point for measuring the lens power Provide a power lens.
  • amend the optical performance in the transmitted light of a lens has aspherical shape.
  • the average of the absolute values of the difference between the surface astigmatism component generated by the aspherical shape of the prescription surface and the surface astigmatism component generated by the spherical or curly surface required for correcting the prescription power "The average value of the surface astigmatism component that is substantially generated by the aspherical prescription surface” or "the average value of the surface astigmatism component" includes the measurement reference point for measuring the lens power. The value is kept below a predetermined value over a predetermined area in the vicinity.
  • the measurement reference point is set using, for example, a lens meter, even though the optical performance in the wearing state is corrected by making the prescription surface aspherical.
  • the measurement frequency By measuring as a reference, it is possible to obtain a measurement frequency almost the same as the prescription frequency. That is, in the progressive-power lens of the present invention, although the optical performance in the wearing state is satisfactorily improved in consideration of the prescription and use conditions of the wearer, the lens power by the spectacle store or the user is one. Measurement can be performed easily.
  • FIG. 1 is a diagram schematically showing a configuration of a progressive-power lens according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing the astigmatism distribution in the transmitted light of the conventional progressive-power lens according to the comparative example of the first example.
  • FIG. 3 is a diagram showing the astigmatism distribution in the transmitted light of the progressive addition lens according to the first example.
  • FIG. 4 is a diagram showing a distribution of surface astigmatism components substantially generated by making the prescription surface aspherical of the progressive-power lens according to the first example.
  • FIG. 5 is a diagram showing the astigmatism distribution in the transmitted light of the conventional progressive-power lens according to the comparative example of the second example.
  • FIG. 6 is a diagram showing the astigmatism distribution in the transmitted light of the progressive addition lens according to the second example.
  • FIG. 7 is a diagram showing a distribution of surface astigmatism components substantially generated by making the prescription surface of the progressive-power lens according to the second example aspherical.
  • Frequency measurement with a lens meter is performed with reference to a measurement reference point on the lens surface. Actually, measurement is performed in a measurement area with a certain area, not a point. In addition, this measurement area includes the type of lens meter and the lens to be measured. T / JP2006 / 313922
  • a predetermined area in the vicinity including a measurement reference point where the average value of the surface astigmatism component generated substantially by the aspherical surface of the prescription surface should be kept below a predetermined value is used for the measurement of the lens meter. It is necessary to decide in consideration of the necessary area (hereinafter referred to as “measurement area”). In other words, if only frequency measurement is considered, it is more effective that the predetermined area where the average value of the above-mentioned astigmatic difference component is not more than a predetermined value is as wide as possible. Optical performance is degraded.
  • the predetermined region in the vicinity including the measurement reference point should be determined in consideration of these various conditions.
  • the predetermined area in the vicinity including the measurement reference point where the average value of the surface astigmatic difference component is equal to or less than the predetermined value extends from the measurement reference point in the horizontal direction of the lens.
  • X (mm) is the distance from the measurement reference point in the vertical direction of the lens
  • y (mm) I (x 2 + y 2 ) l / 2 l ⁇ 2.5 0 (mm) It must be an area that satisfies the conditions
  • the predetermined region where the average value of the surface astigmatic difference component should be kept below a predetermined value is I (x 2 + y 2 ) 1/2 I ⁇ 4.0 0 (mm) is desirable.
  • the surface astigmatism necessary for correcting astigmatism is considered separately from the surface astigmatism generated by making the prescription surface aspherical. That is, as described above, in the present invention, the surface astigmatism component generated substantially by the aspherical surface of the prescription surface is reduced. It is expressed as the absolute value of the difference between the surface astigmatism at any coordinate of the spheroidized prescription surface and the surface astigmatism at the coordinate of the spherical or toric surface necessary for correcting the prescription power.
  • AS (X, y) is the surface astigmatism difference at an arbitrary coordinate (X, y) on the prescription surface, and the corresponding spherical surface or toric surface is necessary to correct the prescription power before being aspherical.
  • the plane astigmatism at the coordinates (X, y) is C (x, y)
  • the surface astigmatism component that is substantially generated at the coordinates (X, y) due to the aspherical surface of the prescription surface is AAS (x , y)
  • AAS (x, y) is expressed by the following equation (1).
  • the average value of the surface astigmatism component that is substantially generated by making the prescription surface aspherical is ⁇ AS av, and the average value AASav is suppressed to a predetermined value or less to achieve the object of the present invention.
  • Table 1 below is a table established in IS Standard 8980-2: 2004 (E), which is an ISO standard for progressive-power spectacle lenses for correcting bending, with astigmatism bending at the measurement reference point. It is a table
  • the object of the present invention can be achieved if the average value AASav is suppressed to be equal to or smaller than the tolerance set in the ISO standard shown in Table 1.
  • the average value AASav is preferably 75% or less of the allowable value in Table 1.
  • ⁇ ASav is more preferably 50% or less of the allowable value in Table 1.
  • the tolerance value for frequency measurement varies depending on the prescription frequency and the astigmatism frequency, but because of the simplification of design and manufacturing practices, the tolerance value of the average value ⁇ AS av It is also possible to make this constant without depending on the wearer's prescription.
  • the tolerance value of the average value AASav can be selected and determined from the tolerance values listed in Table 1, but according to the study of the present inventor, the optical performance in the wearing state is emphasized. In some cases, it is desirable to satisfy AASav ⁇ 0.15 (diop evening), and when the optical performance in the wearing state is more important, it is desirable to satisfy AASav ⁇ 0.12 (diopter).
  • the predetermined region in the vicinity including the measurement reference point where the average value ⁇ AS av of the surface astigmatism component should be kept below a predetermined value is substantially spherical or toric. Is preferred. If an optician or user places more emphasis on measuring power with a lens meter than improving optical performance in transmitted light, i.e., the prescription power and the measured power are substantially matched without taking into account the tolerances of the standard. It is effective to make the prescription surface substantially spherical or toric in the predetermined area.
  • the constant area of the central portion in the measurement area is substantially spherical. It has also been found that the object of the present invention can be achieved by forming a toric surface shape. Therefore, in the area near the measurement reference point that is substantially spherical or toric, the distance from the measurement reference point in the horizontal direction of the lens is X (mm), and the vertical direction of the lens from the measurement reference point I (x 2 + y 2 ) 1/2 I ⁇ 1. 75 (mm)
  • the region satisfies this condition.
  • the neighboring region including the measurement reference point which is substantially spherical or toric surface shape is I (x 2 + y 2 )
  • At least one of the size and shape of the predetermined area in the vicinity including the measurement reference point where the average value ⁇ AS av of the surface astigmatism component should be kept below a predetermined value is Can be determined based on at least one of the following: preferable.
  • the prespherical shape of the prescription surface is spherical, astigmatic, astigmatic, It varies greatly depending on the wearer's prescription and usage conditions such as addition, inset angle and prism prescription. .
  • the measurement conditions of the lens meter which is a measuring instrument, can be measured even if the measuring beam is a circular beam with a diameter of 5 mm.
  • Some manufacturers manufacture lens meters that have a rectangular light beam. Even with the same manufacturer, the conditions vary depending on the manufacturer and measurement method, such as the size and shape of the measurement light beam differing between the manual lens meter and the automatic lens meter. Therefore, the technology according to the present invention is not applied to all lenses under the same conditions, but at least one of the prescription and usage conditions of the wearer, the product specifications, the frequency measurement method, and the measurement instrument specifications.
  • the average value AAS av By taking into account the average value AAS av and determining the size and shape of the predetermined area including the measurement reference point that should be kept below the predetermined value, both superior optical performance and ease of frequency measurement can be achieved. It can be obtained.
  • At least a second derivative of a function representing the surface shape of the prescription surface (for example, a function representing the surface shape in the design of the prescription surface, a function obtained by fitting the actual surface shape of the prescription surface). It is preferable that the process is continuous over almost the entire prescription surface. With this configuration, it is possible to obtain good continuity in appearance and good optical performance in transmitted light, and at the same time always measure as a lens meter. 6313922
  • FIG. 1 is a diagram schematically showing the configuration of a progressive-power lens according to an embodiment of the present invention.
  • the progressive-power lens of this embodiment is suitable for relatively far vision along the main sight line MM 'that divides the refractive surface of the lens into a nose side region and an ear side region in the wearing state.
  • the distance power of the distance F and the surface refraction of the near area N between the distance area F and the near area N And a progressive part P that continuously connects the force.
  • the main line of sight MM ' is the distance reference point (distance center) 0F, the distance eye point E, the geometric center OG of the lens surface, and the near area N measurement standard. This is a reference line that passes through ON.
  • a progressive surface is disposed on the outer surface (the outer surface opposite to the eye), and a prescription surface is disposed on the inner surface (the inner surface on the eye side).
  • the distance reference point OF which is the measurement reference point of the distance portion F, is located 8 mm above the geometric center OG along the main line of sight MM '.
  • the outer diameter (diameter) of each example lens is 70 mm.
  • FIG. 2 is a diagram showing the astigmatism distribution in the transmitted light of the conventional progressive-power lens according to the comparative example of the first example.
  • the astigmatism is 0.5D (diop evening) or less, that is, clear vision. The area is getting narrower.
  • FIG. 3 is a diagram showing the astigmatism distribution in the transmitted light of the progressive addition lens according to the first example.
  • the progressive-power lens according to the first example is the same as the comparative example in FIG. (Spherical power, astigmatism power, addition power, prescription base curve, refractive index), but the inner surface, which is the prescription surface, is aspherical in order to improve the optical performance of transmitted light.
  • the inner surface which is the prescription surface, is aspherical in order to improve the optical performance of transmitted light.
  • the clear vision area of the distance portion F and the near portion N are both good improvement It has been done.
  • FIG. 4 is a diagram showing a distribution of surface astigmatism components substantially generated by making the prescription surface aspherical of the progressive-power lens according to the first example.
  • an optical surface improvement as shown in FIG. 3 is achieved by applying an aspheric surface having a surface astigmatism component distribution as shown in FIG. 4 to the prescription surface.
  • Table 2 shows the distribution of the surface astigmatism component that is substantially generated by asphericalization of the neighboring area including the measurement reference point ⁇ F on the prescription surface of the progressive-power lens according to the first example. It is a table shown. Table 2
  • the horizontal axis described in the uppermost row indicates the distance X (mm) in the horizontal direction of the lens with the measurement reference point OF as the origin
  • the vertical axis described in the leftmost column indicates the measurement
  • the distance y (mm) in the vertical direction of the lens is shown with the reference point OF as the origin.
  • the surface astigmatism component that is substantially generated by asphericalization of the neighboring area including the measurement reference point ⁇ F is a relatively small value (diop constant). It is suppressed.
  • the measurement reference point OF is set by using a lens unit that measures with a light beam having a diameter of 5 mm.
  • the simulation result of the measurement frequency obtained when measured as a reference is shown below.
  • the spherical power and the astigmatic power as the measurement power are less than the comparative example of FIG. 2 due to the influence of the aspherical prescription surface, which is the inner surface.
  • the value is slightly deviated from.
  • Table 1 it can be seen that the deviation of the measured power from the prescription power of the wearer in the first embodiment is sufficiently within the allowable value, and there is no problem in practical use. That is, the objective of the present invention is achieved in the progressive-power lens of the first embodiment.
  • FIG. 5 is a diagram showing the astigmatism distribution in the transmitted light of the conventional progressive-power lens according to the comparative example of the second example.
  • the clear vision areas of the distance portion F and the near portion N are very large. 3922
  • FIG. 7 is a diagram showing a distribution of surface astigmatism components substantially generated by making the prescription surface of the progressive addition lens according to the second example aspherical.
  • the optical performance improvement as shown in FIG. 6 is achieved by providing the prescription surface with an aspheric surface having the distribution of the surface astigmatism component as shown in FIG. Yes.
  • Table 3 below shows the numerical distribution of the surface astigmatism component generated substantially by the asphericalization of the nearby area including the measurement reference point OF on the prescription surface of the progressive addition lens according to the second example. It is a table shown in.
  • the horizontal axis in the uppermost row indicates the distance X (mm) in the horizontal direction of the lens with the measurement reference point OF as the origin, and 5 in the leftmost column.
  • the vertical axis represents the distance y (mm) in the vertical direction of the lens with the measurement reference point OF as the origin.
  • the surface astigmatism component that is substantially generated by asphericalization of the neighboring area including the measurement reference point OF is suppressed to almost 0 (diop evening)
  • the surface shape is substantially equal to the toric surface.
  • a measurement reference point 0 F is set using a lens meter that measures light with a diameter of 5 mm.
  • the simulation results of the measurement frequency obtained when measuring as a reference are shown below.

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  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

L’invention concerne une lentille à puissance de réfraction progressive dont la puissance peut être facilement mesurée par un opticien ou par un utilisateur mais présentant tout de même des progrès satisfaisants en matière de performances optiques pendant que l’utilisateur porte la lentille. La lentille comprend, le long d’une ligne de fixation principale (MM') qui divise un plan de réfraction de lentille en une zone côté nez et une zone côté oreille, une unité pour visualisation de loin (F) adaptée de manière comparative pour une visualisation de loin, une unité de lecture (N) adaptée de manière comparative pour une visualisation de près, et une unité progressive (P) permettant de connecter en continu le plan de puissance de réfraction de l’unité pour visualisation de loin et le plan de puissance de réfraction de l’unité de lecture, lors du port de la lentille. Une valeur moyenne des valeurs absolues des différences entre une composante de différence astigmate superficielle générée par la surface asphérique prescrite constituée pour corriger les performances optiques au niveau d’un faisceau lumineux de transmission de lentille et une composante de différence astigmate superficielle générée par une surface sphérique ou torique nécessaire à la correction de puissance prescrite peut atteindre une valeur spécifiée dans une zone spécifiée au voisinage d’un point de référence de mesure (OF) et englobant celui-ci.
PCT/JP2006/313922 2005-07-21 2006-07-06 Lentille à puissance de réfraction progressive WO2007010806A1 (fr)

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JP2012515933A (ja) * 2009-01-20 2012-07-12 ローデンストック．ゲゼルシャフト．ミット．ベシュレンクテル．ハフツング プログレッシブレンズデザインの自動変更
JP5000505B2 (ja) 2005-07-21 2012-08-15 株式会社ニコン・エシロール 累進屈折力レンズ
JP2012220655A (ja) * 2011-04-07 2012-11-12 Seiko Epson Corp 累進屈折力レンズの設計方法
US9195074B2 (en) 2012-04-05 2015-11-24 Brien Holden Vision Institute Lenses, devices and methods for ocular refractive error
US9201250B2 (en) 2012-10-17 2015-12-01 Brien Holden Vision Institute Lenses, devices, methods and systems for refractive error
US9541773B2 (en) 2012-10-17 2017-01-10 Brien Holden Vision Institute Lenses, devices, methods and systems for refractive error
US10386652B2 (en) 2014-06-18 2019-08-20 Nikon-Essilor Co., Ltd. Lens design method, lens manufacturing method, storage medium, and lens design system
CN113906332A (zh) * 2019-09-25 2022-01-07 豪雅镜片泰国有限公司 渐进屈光力镜片的设计方法、渐进屈光力镜片的设计系统以及渐进屈光力镜片组
CN114930227A (zh) * 2019-12-20 2022-08-19 株式会社尼康依视路 眼镜镜片的设计方法、眼镜镜片的制造方法、眼镜镜片、眼镜镜片设计装置、眼镜镜片订购及接受订购系统以及设计程序

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JPS5487243A (en) 1977-12-22 1979-07-11 Seiko Epson Corp Eyeglass lens
WO2007010806A1 (fr) 2005-07-21 2007-01-25 Nikon-Essilor Co., Ltd. Lentille à puissance de réfraction progressive

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Cited By (25)

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Publication number Priority date Publication date Assignee Title
JP5000505B2 (ja) 2005-07-21 2012-08-15 株式会社ニコン・エシロール 累進屈折力レンズ
JP2012515933A (ja) * 2009-01-20 2012-07-12 ローデンストック．ゲゼルシャフト．ミット．ベシュレンクテル．ハフツング プログレッシブレンズデザインの自動変更
US8888280B2 (en) 2009-01-20 2014-11-18 Rodenstock Gmbh Automatic modification of a progressive lens design
JP2012220655A (ja) * 2011-04-07 2012-11-12 Seiko Epson Corp 累進屈折力レンズの設計方法
US9535263B2 (en) 2012-04-05 2017-01-03 Brien Holden Vision Institute Lenses, devices, methods and systems for refractive error
US11644688B2 (en) 2012-04-05 2023-05-09 Brien Holden Vision Institute Limited Lenses, devices and methods for ocular refractive error
US10838235B2 (en) 2012-04-05 2020-11-17 Brien Holden Vision Institute Limited Lenses, devices, and methods for ocular refractive error
US9575334B2 (en) 2012-04-05 2017-02-21 Brien Holden Vision Institute Lenses, devices and methods of ocular refractive error
US11809024B2 (en) 2012-04-05 2023-11-07 Brien Holden Vision Institute Limited Lenses, devices, methods and systems for refractive error
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