WO2023045989A1 - Lentille ophtalmique multifocale progressive - Google Patents

Lentille ophtalmique multifocale progressive Download PDF

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Publication number
WO2023045989A1
WO2023045989A1 PCT/CN2022/120374 CN2022120374W WO2023045989A1 WO 2023045989 A1 WO2023045989 A1 WO 2023045989A1 CN 2022120374 W CN2022120374 W CN 2022120374W WO 2023045989 A1 WO2023045989 A1 WO 2023045989A1
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WIPO (PCT)
Prior art keywords
lens
ophthalmic lens
optical
progressive
value
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PCT/CN2022/120374
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English (en)
Chinese (zh)
Inventor
沙伊尔苏海
肖真
康梦田
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珠海菲特兰医疗科技有限公司
菲特兰有限公司
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Publication of WO2023045989A1 publication Critical patent/WO2023045989A1/fr

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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
    • G02C7/06—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
    • 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
    • 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
    • G02C7/041—Contact lenses for the eyes bifocal; multifocal
    • G02C7/044—Annular configuration, e.g. pupil tuned
    • 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

Definitions

  • the present disclosure relates to the technical field of ophthalmic lenses, and more specifically, to a high-dimensional progressive multifocal ophthalmic lens.
  • Myopia is a common vision problem.
  • Traditional glasses are a standard tool for myopia correction.
  • wearing ordinary glasses can increase myopia rapidly every year.
  • the progression of myopic refractive error can be controlled by positioning the focal point in front of the retina, that is, through lens design so that the curved surface formed by the imaging point - the Petzval plane - is tangent to the retina in the macular area and lies in the paracentral area of the retina. Inner side, forming peripheral myopic defocus.
  • multi-focal lenses need to be used.
  • Some multi-focal designs in the prior art adopt ring-shaped refractive multi-focal technology or diffractive multi-focal technology.
  • Such a technical solution will cause sudden changes in optical power or surface morphology of the lens, causing scattering or diffraction in the sudden change area.
  • scattering may cause diffuse light to irradiate the macular area, resulting in halos, spots, and reduced contrast sensitivity.
  • Diffraction multi-focus usually only uses the first few levels of diffracted light, and part of the light energy cannot be transmitted to the retina, causing energy loss.
  • the decrease in utilization, performance is also a decrease in contrast sensitivity.
  • the continuous multi-focus design can avoid these problems.
  • doctors may need to adjust the intensity of myopia defocus and imaging quality according to the progress speed of the patient.
  • the degree of freedom provided by the coupled addition power and the gradual multi-focus path is small, which cannot fully meet the needs of doctors.
  • the present invention provides a progressive addition ophthalmic lens comprising in its optic zone a progressive addition zone having an optical center and a radius r B , wherein, in the optic zone, the distance
  • the optical power P(r) at the optical center r mm is:
  • A is the additional optical power
  • L is the gradient coefficient
  • P C is the optical center optical power
  • P C prescription optical power P 0 ;
  • A is selected from +0.25D to +10.00D.
  • L is selected from 0.1-10.
  • the optical center does not coincide with the geometric center of the lens.
  • the optical center is located 0.1-1 mm nasally from the geometric center.
  • the gradient multi-focal area includes 2 or more fan-shaped divisions sharing a central vertex, wherein each fan-shaped division has the same A value and PC value, and wherein at least one fan-shaped division has a different L value.
  • the progressive multi-focus area includes 4 sector-shaped partitions.
  • the lens is provided with a structure for increasing the rotational stability of the lens.
  • the lens is a contact lens, scleral lens, spectacle lens, intraocular lens, or corneal inlay.
  • the lenses are used to prevent and/or slow the progression of myopia.
  • the present invention thus also provides a method for providing an ophthalmic lens to a subject, preferably a subject who is myopic or belongs to a myopia-prone population.
  • the ophthalmic lens includes in its optic zone a progressive addition zone having an optical center and a radius r B , the method comprising:
  • P(r) is the optical power at r mm from the optical center
  • A is the additional optical power
  • L is the gradient coefficient
  • P C is the optical power of the optical center
  • P C prescription optical power P 0 ;
  • the selection in step (1) is based on: the subject's age, the ratio of the subject's near vision time to distance vision time, and the myopia progression of the at least one eye Velocity, retinal topography, residual accommodation, or any combination thereof.
  • the method of the present invention further comprises dividing the progressive multifocal zone of the ophthalmic lens into 2 or more according to the retinal topography or refractive topography of the at least one eye of the subject.
  • Figures 4A to 4C are the optical simulation software OpticStudio Zemax, when CD contact lenses with different A and L values are placed on the surface of the model eye Liou&Brenna, the different spherical power curves (Figure 4A) and field curvature (Figure 4A) are calculated. 4B) and MTF curves (Fig. 4C);
  • Figures 5A to 5C are the different spherical power curves (Figure 5A) and field curvature (Figure 5A) calculated by the optical simulation software OpticStudio Zemax when CN contact lenses with different A and L values are placed on the surface of the model eye Liou&Brenna 5B) and MTF curves (Fig. 5C).
  • the invention provides a progressive multifocal ophthalmic lens.
  • the ophthalmic lens can be a progressive multi-focal lens for preventing the occurrence of myopia and controlling the progression of myopia, or a progressive multi-focus lens for presbyopia and hyperopia.
  • the lens includes in its optic zone a progressive addition zone having an optical center and a radius r B , wherein, in the optic zone, the optical power P at a distance r mm from the optical center (r) is:
  • A is the additional optical power
  • L is the gradient coefficient
  • P C is the optical center optical power
  • PC prescription power P 0 ; that is, the power at the optical center of the lens is the prescription power.
  • the lens is basically CD (center- for-distance) lenses (see the solid line in Figure 1).
  • the lens is basically a CN (center-for-near) lens (see dotted line in Figure 1).
  • the present invention decouples the addition power from the progressive multi-focal path, so that doctors can adjust the prescription of the lens according to the patient's condition (such as the degree of myopia, the degree of tolerance, the speed of myopia progression, etc.), and can also adjust the prescription according to the patient's retinal topography/refraction.
  • the patient's condition such as the degree of myopia, the degree of tolerance, the speed of myopia progression, etc.
  • Optical topography (some patients will have local deformation of the retina, such as patients with posterior staphyloma) to adjust the lens, giving doctors more freedom in fitting, thus providing subjects with ophthalmic lenses that better meet their characteristics and needs. lens.
  • L can be any value selected from 0.1 to 10, such as 0.1, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9 , 9.5, 10.
  • the greater the difference between L and 1 the greater the change rate of the focal power in some areas (when L>1, it is the peripheral area; when L ⁇ 1, it is the central area), that is, the local focal power curve will be more steep.
  • L is any value selected from 0.5 to 2, such as 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2.
  • the optical add power A itself is positive.
  • the additional optical power A can be any value selected from +0.25D to +10.00D, preferably +0.50D to +9.00D, +0.75D to +8.00D, +1.00D to +7.00D , +1.25D to +6.00D, +1.50D to +5.00D, or +2.00D to +4.00D, such as +0.25D, +0.50D, +0.75D, +1.00D, +1.25D, +1.50D , +1.75D, +2.00D, +2.25D, +2.50D, +2.75D, +3.00D, +3.25D, +3.50D, +3.75D, +4.00D, +4.25D, +4.50D, + 4.75D, +5.00D, +5.25D, +5.50D, +5.75D, +6.00D, +6.25D, +6.50D, +6.75D, +7.00D, +7.25
  • the A value is preferably +1.00D to +5.00D, more preferably +2.00D to +4.00D.
  • the focal power changes under different combinations of A and L were obtained by calculation ( Figure 4A and Figure 5A), where the abscissa represents the distance from the center of the lens, and the ordinate represents the spherical power. As shown in Figures 4A and 5A, the larger A is, the higher the addition power is; the larger L is, the smoother the power change is.
  • Field curvature (Fig. 4B and Fig. 5B) and MTF curves (Fig. 4C and Fig. 5C) under different combinations of A and L were also obtained by calculation. Among them, the extent to which the curvature of field moves in the negative direction is the degree of myopia defocus.
  • the low-frequency part of MTF reflects the transfer of object outlines; the intermediate frequency part reflects the transfer of optical object layers; the high-frequency part reflects the transfer of object details.
  • Table 1 The results shown in the figure are summarized in Table 1.
  • a and L have different effects in central distance lenses and central near vision lenses.
  • doctors can choose different combinations of A and L according to the patient's myopia progression speed, adjustment lag and other factors, so as to provide stronger myopia control or better vision. Sensitivity to adjust lens formulation parameters.
  • the entire optical zone of the lens is a progressive addition zone, that is, r B is equal to the optical zone radius of the lens.
  • r B can be any value selected between 0.5 and 3.5 mm, such as 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2 , 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4mm.
  • r B is preferably in the range of 2.5 to 3.5 mm, so as to provide the desired myopia defocus effect in more areas on the retina.
  • the optical center of the progressive multi-focal area does not coincide with the geometric center of the lens, because the visual axis of the human eye does not coincide with the optical axis, and there is an included angle, namely the Kappa angle . Therefore, the doctor can select the optical center position of the lens according to the Kappa angle of the patient, for example, the optical center is 0.1-1 mm from the nasal side of the geometric center, such as 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 mm, preferably 0.5mm.
  • the lens design of the present invention also allows the progressive multifocal area to be divided into 2 or more (for example, 3, 4, 5, 6, 7, 8) fan-shaped partitions that share a central vertex, wherein each fan-shaped partition has the same
  • the A value and PC value of , and at least one of the fan-shaped partitions has a different L value.
  • Existing literature shows that on both sides of the fovea, the shape of the nasal side and the temporal side of the human retina is not completely symmetrical. Therefore, axisymmetric contact lenses or frame glasses may produce different myopic defocus on the nasal and temporal sides of the retina, resulting in an asymmetric emmetropization process on both sides of the retina, which may result in partial axial growth.
  • the method of the invention enables the doctor to adjust according to the fundus conditions of different subjects, so that the power curve of the lens is different in different regions.
  • the lens can be divided into four subregions: upper, lower, nasal side, and temporal side, and the gradual change path of each subregion can be different, that is, L is different. It is preferably divided into 2 to 4 partitions.
  • Doctors can change the gradient coefficients of each division according to the subject's retinal topography or refractive topography, and choose the combination of A and L according to the patient's myopia progression.
  • the progressive multifocal ophthalmic lens of the present invention is selected from contact lenses, scleral lenses, spectacle lenses, intraocular lenses or corneal inlays, and is provided with structures for increasing the rotational stability of the lens if necessary. Because in the case of an asymmetric optical zone of the lens, it must be effectively maintained at a specific orientation. Especially in the case of contact lenses, they tend to rotate on the eye due to the force the eyelid exerts on the contact lens during blinking and the movement of the eyelid and tear film. Maintaining the orientation of the contact lens on the eye is usually achieved by altering the mechanical properties of the contact lens.
  • Known methods include: prismatic weighting (including eccentricity or inclination of the anterior contact lens surface relative to the posterior surface), thickening of the lower contact lens perimeter, forming depressions or protrusions on the contact lens surface, and truncating the contact lens edge, among others.
  • the present invention also provides a method for providing an ophthalmic lens to a subject, particularly a myopic patient or a myopic-prone population, said ophthalmic lens comprising a progressive multifocal zone in its optical zone, said progressive multifocal zone With optical center and radius r B , the method includes:
  • P(r) is the optical power at r mm from the optical center
  • A is the additional optical power
  • L is the gradient coefficient
  • P C is the optical power of the optical center
  • P C prescription optical power P 0 ;
  • the selection in step (1) is based on: the age of the subject, the ratio of the subject's near vision time and distance vision time, the myopia progression rate of the at least one eye, the retinal topography , residual accommodation, or any combination thereof.
  • the value is adjusted according to factors such as patient tolerance and adjustment lag.
  • A 1/near vision-patient's remaining accommodation power, therefore, the add power A is determined by the patient's remaining accommodation power. The greater the remaining adjustment power, the smaller the number of additions required.
  • myopia patients when the myopia progression rate is greater than the average annual progression rate of patients of the same age, strong control is selected, or for young subjects (such as 8-12 years old), because their myopia progression rate is usually faster, Strong control can also be adopted; when the progression rate of myopia is approximately equal to the average annual progression rate of patients of the same age, moderate control is selected; when the progression rate of myopia is lower than the average annual progression rate of patients of the same age, weak control is selected. If the growth rate of myopia increases after wearing weak control lenses for a period of time, such as 1 month, then return to strong control lenses.

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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 ophtalmique multifocale progressive et un procédé de fourniture d'une lentille à un sujet. La puissance d'addition de la lentille ophtalmique multifocale progressive n'est pas associée à une trajectoire multifocale progressive, ce qui permet d'obtenir un plus grand degré de liberté d'optométrie et de s'adapter à un médecin, et de fournir en outre le sujet à la lentille ophtalmique qui satisfait davantage aux caractéristiques et aux exigences de celui-ci.
PCT/CN2022/120374 2021-09-23 2022-09-22 Lentille ophtalmique multifocale progressive WO2023045989A1 (fr)

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CN202111116541.7 2021-09-23
CN202111116541.7A CN115268108A (zh) 2021-09-23 2021-09-23 一种渐变多焦眼科镜片

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Citations (6)

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Publication number Priority date Publication date Assignee Title
CN101203795A (zh) * 2005-05-05 2008-06-18 卡尔蔡司视觉澳大利亚控股有限公司 渐进多焦点眼科镜片元件阵列
CN108139604A (zh) * 2015-10-15 2018-06-08 依视路国际公司 用于近视眼或正视眼且老花眼配戴者的渐变多焦点眼科镜片、用于提供此类镜片的方法
US20200057315A1 (en) * 2018-08-20 2020-02-20 Shamir Optical Industry Ltd. Progressive optical designs for different add powers
WO2020225449A1 (fr) * 2019-05-09 2020-11-12 Essilor International Verre ophtalmique à addition progressive adapté pour un porteur
CN112882254A (zh) * 2021-02-10 2021-06-01 苏州科技大学 一种适用于近视转老花人群的渐进多焦点眼用镜片及其设计方法
CN113253482A (zh) * 2021-06-01 2021-08-13 苏州科技大学 一种渐进多焦点眼镜片两段式子午线设计方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8960901B2 (en) * 2009-02-02 2015-02-24 Johnson & Johnson Vision Care, Inc. Myopia control ophthalmic lenses
CN102830505B (zh) * 2012-09-08 2013-12-18 苏州科技学院 一种个性化渐进多焦点眼用镜片的制备方法
US10274750B2 (en) * 2016-07-21 2019-04-30 National Taiwan University Of Science And Technology Progressive multifocal contact lens and producing method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101203795A (zh) * 2005-05-05 2008-06-18 卡尔蔡司视觉澳大利亚控股有限公司 渐进多焦点眼科镜片元件阵列
CN108139604A (zh) * 2015-10-15 2018-06-08 依视路国际公司 用于近视眼或正视眼且老花眼配戴者的渐变多焦点眼科镜片、用于提供此类镜片的方法
US20200057315A1 (en) * 2018-08-20 2020-02-20 Shamir Optical Industry Ltd. Progressive optical designs for different add powers
WO2020225449A1 (fr) * 2019-05-09 2020-11-12 Essilor International Verre ophtalmique à addition progressive adapté pour un porteur
CN112882254A (zh) * 2021-02-10 2021-06-01 苏州科技大学 一种适用于近视转老花人群的渐进多焦点眼用镜片及其设计方法
CN113253482A (zh) * 2021-06-01 2021-08-13 苏州科技大学 一种渐进多焦点眼镜片两段式子午线设计方法

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