WO2016076743A1 - Контактная линза для коррекции зрения (варианты) - Google Patents
Контактная линза для коррекции зрения (варианты) Download PDFInfo
- Publication number
- WO2016076743A1 WO2016076743A1 PCT/RU2014/000842 RU2014000842W WO2016076743A1 WO 2016076743 A1 WO2016076743 A1 WO 2016076743A1 RU 2014000842 W RU2014000842 W RU 2014000842W WO 2016076743 A1 WO2016076743 A1 WO 2016076743A1
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- WO
- WIPO (PCT)
- Prior art keywords
- contact lens
- hole
- contact
- lens
- radius
- Prior art date
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Classifications
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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
Definitions
- the invention relates to medicine, in particular, to the field of ophthalmology, namely, are options for various designs of contact lenses intended for vision correction.
- a contact lens [1] is known, for example, comprising a front and a rear surface, characterized in that the rear surface is made in the form of a central and peripheral optical zones, the radius of curvature (Ko) of the central optical zone is made in the range from 7.0 to 9.8 mm with a maximum deviation of ⁇ 0.1 mm, the radius of curvature (R1) of the peripheral zone of the lens is 1 .0 mm larger than the radius of curvature of the central optical zone with a maximum deviation of ⁇ 0.1 mm, the total diameter of the lens (D total) is 14, 5 mm with a maximum deviation of ⁇ 0.1 mm, and the corresponding optical diameter th zone (DI) equal to 12.1 mm, with maximum deviation ⁇ 0,4 mm, the lens is formed from a hydrophilic polymeric mater.
- the radius of curvature (Ko) of the central optical zone is made in the range from 7.0 to 9.8 mm with a maximum deviation of ⁇ 0.1 mm
- the posterior vertex refraction of the lens can be in the range from -25.0 to -13.0 diopters, or in the range from ⁇ 6.0 to ⁇ 25.0 diopters.
- the thickness of the lens at the geometric center (tc) can be made within ⁇ 0. 1 0 to 0.80 mm with a margin of deviation of ⁇ 0.03 mm.
- the optical element is made with a phase microrelief and has central and reference sections, at least one optical element with a false microrelief is additionally introduced into the device, having a central and supporting sections, and a substrate, while all the elements and the substrate are interconnected along the supporting sections with the alignment of the optical axes of the Central sections with the optical axis of the device, with the surface with a phase microrelief adjacent to the surfaces of the substrate.
- the invention [3] relates to the field of ophthalmology and is directed to the creation of contact lenses that can be used to correct ocular aberrations of the wave front of a high and low order and in which h excessive measurements of the thickness of the lens are minimized, which provides e-] due to that the method of forming an ophthalmic lens according to the invention includes obtaining initial wavefront aberration data for a human eye with a first diameter, extrapolating aberration data to a second diameter p and approx Applying a mathematical filter to each meridian of extrapolated aberration data to reduce exceeding variations in the thickness of the lens surface.
- the second diameter essentially corresponds to the diameter of the optical zone of the contact lens or exceeds it, and the filter is selected from the groups consisting of a Hamming window, a Hanning window, a Parzen window, a Blackman window, and about U a.
- the technical result is to create such a contact structure for vision correction, which would allow, depending on the design option, to exclude deformation of epithelial cells in the center, to achieve and maintain an orthokeratological effect, to create peripheral myopic defocus, including, to inhibit the progression of myopia, to reduce injuries of the cornea during operation, to reduce injuries when donning and removing , To enhance the effectiveness of vision correction and accelerate the process of correction, to provide an opportunity to center the contact lens, as well as the possibility of multifocal effect, provide corneal power.
- the technical result is achieved by offering the following design options for the contact lens for vision correction: - a contact lens for vision correction, made in a rounded shape, in the central part of which, depending on the design of the contact lens, a hole is made, or a hole is made in a round shape, or a through hole is made, or a through hole in a round shape is made, with the main parameters that include: radius of the outer ring of the contact lens, radius of the inner ring of the contact lens, horizontal diameter of the contact lens, vertical diameter of the contact lens, with the inside of the contact the lens and the outer side of the contact lens, with a hole in the center of the contact lens, the thickness of the contact lens on the face and hole of the central part, the thickness of the outer ring of the contact lens, the focal length of the inner side of the contact lens, the focal length of the outer side of the contact lens mounted on the open part eyeball manually when in direct contact with the outer shell of the eye, or manually using tweezers designed to install contact lenses, or other in the possible
- a contact lens for vision correction made in a rounded shape, including in the form of a circle or in the form of an ellipse, in the central part of which, depending on the design options of the contact lens, a hole of a rounded shape is made, including in the form of a circle or in the form the ellipse is either a through hole, or a round through hole is made, including in the form of a circle or an ellipse, with the main parameters that include: the radius of the outer ring of the contact lens, the radius of the inner ring of the contact lens, horiz The actual diameter of the contact lens, the vertical diameter of the contact lens, with the inside of the contact lens and the outside of the contact lens, with the hole in the center of the contact lens, the thickness of the contact lens at the border of the hole in the central part, the thickness of the outer ring of the contact lens, the focal length of the inside of the contact lens , the focal length of the outer side of the contact lens, mounted on the open part of the eyeball manually
- Vision correction is carried out using the proposed contact lens options, the design of which in all cases allows to reduce injuries of the corneal epithelium by eliminating deformation of the epithelial cells in the center, allows to achieve and maintain the orthokeratological effect, as well as allows to reduce injuries when putting on and removing, provides the ability to center the contact lens, while the contact lens and the nail are made based on ophthalmic and medical indications and taking into account the geometric parameters of the patient’s eye, with an opening in the central part of the contact lens, including a through an rounded hole in the central part of the contact lens, the size of the diameter, the diameters of which varies from 0.01 mm to 10 mm depending on the size of the patient’s eye, the possibility of obtaining multi focal effect, the possibility of corneal nutrition.
- the proposed design of the contact lens in the proposed options is that in the Central part, depending on the design options of the contact lens, a hole is made, or a hole is rounded, or a through hole is made, or a through hole is rounded.
- a contact lens with a hole in the center is a multifocal lens, with the help of which stable visual acuity is achieved, both when looking at a long distance and at close distances, while near vision provides the central zone of the lens, in which the central hole is located - for example, patients with myopia near see well due to their myopia, while in such patients long-distance vision is noticeably weaker. And long-distance vision is provided by the lens.
- Vision correction for the proposed lens design is based on the use of a physiological factor - accommodative myosis: when the gaze is directed to infinity, the pupil diameter is maximum, respectively, the far field of vision becomes active and light rays pass through the lens, refracting and focusing in the macular zone, and when the object is located at close distances, the pupil diameter is minimal, and the iris of the eye hides the areas of distant and intermediate vision, while only the region of the near rhenium, that is, the central part of the cornea, which corresponds to the central part of the lens, exactly where the hole is located in the central part of the lens - light rays with this lens design do not hit the lens, but fall into the center hole of the lens and do not scatter, and focus in the macular zone.
- a physiological factor - accommodative myosis when the gaze is directed to infinity, the pupil diameter is maximum, respectively, the far field of vision becomes active and light rays pass through the lens, refracting and focusing in
- the advantages of the design of the contact lens allow for vision correction when using the contact lens due to the fact that: when putting on and operating the contact lens, injuries are reduced corneal epithelium due to the exclusion of deformation of epithelial cells in the center, the orthokeratological effect is achieved and maintained during operation of such a contact lens at night, and injuries are also reduced when putting on and removing a contact lens, since this process occurs with the help of, inter alia, tweezers for putting on and removing lenses.
- This design of the lens provides the ability to center the contact lens without additional ophthalmic studies, while the contact lens is made based on medical indications and taking into account the geometric parameters of the patient’s eye, with a through hole in the central part of the contact lens, the diameter of which varies from 0.0 1 mm up to 10 mm, depending on the size of the patient’s eye, the possibility of obtaining a multifocal effect, the possibility of corneal nutrition.
- hypoxia of the cornea of the eye is reduced, since a contact lens in the form of a ring covers a smaller area of the cornea, and accordingly, the nutrition of the cornea is better than with conventional contact lenses that completely cover the central part of the cornea.
- the life of a contact lens with a hole in the center is not important, since if there is a hole in the center of the contact lenses, they can be worn around the clock without removing. In such contact lenses one can sleep, because, thanks to the design - with a hole in the center - during their operation the nutrition of the cornea is not disturbed, since the tear is in maximum contact and washes the surface of the cornea of the eye.
- the rays of light passing through the hole in the central part of the lens are not refracted, and the rays that pass through the lens itself are refracted, thereby forming several focal points on the retina of the eyeball, forming multifocus.
- Hygienically contact lenses with a hole are safer because, thanks to the hole made in the center, less accumulated white and protein deposits accumulate on the lens itself. Landing a contact lens with a hole, including using tweezers, becomes more accurate, which allows the patient to select the lens the first time and get the desired result without unnecessary medical manipulation.
- figure 1. presents a diagram of the options for the proposed design of the contact lens made in the form of a circle with a hole cut out in the form of a circle - front view, where
- Figure 2 presents a diagram of the options for the proposed design of the contact lens - left or right view, where:
- the proposed design of the contact lens is. that in the central part, depending on the design options of the contact lens, a hole is made, or a round hole is made, or a through hole is made, or a round hole is made, when manufacturing take into account, inter alia, such parameters as: 1 - radius the outer ring of the contact lens, 2 is the radius of the inner ring of the contact lens, 3 is the horizontal diameter of the contact lens, 4 is the vertical diameter of the contact lens, and also for the manufacture of the inner side of the contact lens 5.
- a contact lens for vision correction made in a rounded shape, depending on the design options of the contact lens, a hole is made, or a hole is made in a round shape, or a through hole is made, or a through hole is made in a round shape, offset from the center of the contact lens, with the main parameters, which include: the radius of the outer ring of the contact lens, the radius of the inner ring of the contact lens, the horizontal diameter of the contact lens, the vertical diameter of the contact lens, with the inner side of the contact lens and the outer side of the contact lens, with a hole in the center of the contact lens, the thickness of the contact lens at the border of the hole of the Central part, the thickness of the outer ring of the contact lens, the focal length of the inner side of the contact lens, the focal length of the outer side of the contact lens mounted on the open part eyeball manually when in direct contact with the outer shell of the eye, or manually with tweezers designed to install contact lenses, or other possible way.
- a contact lens for vision correction made in a rounded shape, including in the form of a circle or in the form of an ellipse, depending on the design options of the contact lens, a round hole is made, including in the form of a circle or in the form of an ellipse, or a through hole is made , or a through hole of a round shape is made, including in the form of a circle or an ellipse, offset from the center of the contact lens, with the main parameters that include: the distance from the center of the contact lens, the radius of the outer ring of the contact th lens, radius of the inner ring of the contact lens, horizontal diameter of the contact lens, vertical diameter of the contact lens, with the inside of the contact lens and the outside of the contact lens, with a hole in the center of the contact lens, the thickness of the contact lens at the border of the hole W
- Contact lenses with a hole in the shape of an ellipse will allow, for example, for astigmatism, for example, to accurately fit such a contact lens on the cornea of the eyeball and to correct vision without disturbing the nutrition of the cornea, since tear fluid naturally circulates through the hole in the contact lens and oxygen access to the central parts of the cornea, in contrast to a contact lens made without a hole in the center.
- Contact lenses with a decentralized opening can be used for altered corneas, such as keratoconus.
- the hole will coincide with the tip of the keratoconus, which is usually located in the lower outer quadrant of the cornea.
- FIGS. 3-8 show different designs of contact lenses with different openings, both in shape and in relation to the center of the contact lens, which illustrate contact lenses for vision correction, other than round lenses with a round hole in the center.
- 13 is a horizontal radius of the inner hole of a contact lens made in the form of an ellipse
- 1 5 is the horizontal outer diameter of the contact lens.
- 17 is a short radius of the inner hole of a contact lens made in the form of an ellipse
- 18 is a long radius of the inner hole of a contact lens made in the form of an ellipse
- 19 is a horizontal outer diameter of a contact lens made in the form of a circle
- FIG. 20 is a vertical outer diameter of a contact lens made in the form of a circle, FIG. 5.
- a diagram of the proposed design of the contact lens is presented - front view, where:
- 21 is a short radius of the inner hole of the contact l inza, made in the form of an ellipse,
- 22 is a long radius of the inner hole of a contact lens made in the form of an ellipse
- 20 is a vertical outer diameter of a contact lens made in the form of an ellipse
- Fig.7. presents a diagram of the proposed design and a contact lens made in the form of a circle with a cut out decentralized hole in the form of a circle - front view, where:
- 31 is the radius of the inner hole of the contact lens made in the form of a circle, 32 - the radius of the outer ring of a contact lens made in the form of a circle,
- FIG. 34 is a vertical diameter of a contact lens made in the shape of a circle
- Fig.8. presents a diagram of the proposed design of a contact lens made in the form of an ellipse with a cut out decentralized hole in the form of a circle - front view, where:
- 35 is the radius of the inner hole of the contact lens, made in the form of a circle,
- 36 is a long horizontal radius of the outer ring of the contact lens made in the form of an ellipse
- 39 is the vertical diameter of the external ellipse of a contact lens made in the form of an ellipse.
- Such contact lenses can form, for example, according to the proposed invention, peripheral defocus to inhibit the progress and development of myopia, for example, in preparing the patient for kerato-refractive operations with progressive myopia.
- the proposed design of the contact lens depending on the geometry of each variant of the lens, form mules with focus. correct presbyopia, myopia, hyperopia, astigmatism.
- a portion of the lens with additional refractive properties as well as the possibility of shifting focus using the prism effect and increasing visual acuity during macular degeneration the retina , the ability to correct vision in various diseases caused mainly by tears and / or damage to the retina in the macular zone.
- the proposed contact lens is made of various materials, including hydrophilic, hydrophobic, combined, hard, soft, combined.
- the claimed technical result was achieved by the proposed design options for the contact lens for vision correction, which, depending on the design option, exclude deformation of the corneal epithelial cells in the center, achieve and maintain the orthokeratological effect, create peripheral myopic defocus, including to inhibit the progression of myopia, to reduce injuries of the corneal epithelium during operation, to reduce injuries when putting on and removing a contact lens, to increase the effect of the effectiveness of vision correction and accelerate the process of vision correction, provide the ability to center the contact lens, as well as the ability to obtain a multifocal effect, provide nutrition to the cornea.
- the invention relates to medicine, in particular to the field of ophthalmology, and is intended for vision correction using the proposed options for contact lenses, which are made of various materials, including hydrophilic, hydrophobic, combined, hard, soft, combined.
- Vision correction is carried out using the proposed contact lens options, the designs of which can reduce injuries of the corneal epithelium by eliminating deformation of epithelial cells in the center, make it possible to achieve and maintain an orthokeratological effect, and also reduce injuries when donning and removing, provide the ability to center the proposed contact options lenses, guarantee the possibility of obtaining a multifocal effect, allow the cornea to be nourished.
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/RU2014/000842 WO2016076743A1 (ru) | 2014-11-13 | 2014-11-13 | Контактная линза для коррекции зрения (варианты) |
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PCT/RU2014/000842 WO2016076743A1 (ru) | 2014-11-13 | 2014-11-13 | Контактная линза для коррекции зрения (варианты) |
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WO2016076743A1 true WO2016076743A1 (ru) | 2016-05-19 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4659522A (en) * | 1982-09-13 | 1987-04-21 | Neefe Charles W | Method of spin casting an ophthalmic device with a central aperture |
US4886350A (en) * | 1983-12-30 | 1989-12-12 | Ceskoslovenska Akademie Ved | Perforated soft contact lens and a method for manufacturing thereof |
US5270051A (en) * | 1991-10-15 | 1993-12-14 | Harris Donald H | Enzyme-orthokeratology |
JP2000249990A (ja) * | 1999-03-01 | 2000-09-14 | Yasuyoshi Mihashi | 中央に小孔を有するコンタクトレンズ |
-
2014
- 2014-11-13 WO PCT/RU2014/000842 patent/WO2016076743A1/ru active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4659522A (en) * | 1982-09-13 | 1987-04-21 | Neefe Charles W | Method of spin casting an ophthalmic device with a central aperture |
US4886350A (en) * | 1983-12-30 | 1989-12-12 | Ceskoslovenska Akademie Ved | Perforated soft contact lens and a method for manufacturing thereof |
US5270051A (en) * | 1991-10-15 | 1993-12-14 | Harris Donald H | Enzyme-orthokeratology |
JP2000249990A (ja) * | 1999-03-01 | 2000-09-14 | Yasuyoshi Mihashi | 中央に小孔を有するコンタクトレンズ |
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