Patent EP0212616A2 successfully refreshed from Google Patents.
EP0212616A2
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EP
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Intraocular lens
Assignee: Kingston Technologies Inc
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Filing: 1986-08-20
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Granted: —
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Expires: 2006-08-20
Abstract
Abstract An artificial intraocular lens (10) features an optical body for refracting images onto the retina and an outer surface that encloses the optical body, is exposed to fluid within the eye, and has a refractive index no greater than 1.40. In another aspect, the optical body includes an internal refractive surface whose contour can be selectively changed to change its refractive power.
Inventors
- 👤 Vladimir A. Stoy
- 👤 George P. Stoy
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 03:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1648; A61L; A61L27/00; A61L27/14; G; G02; G02B; G02B3/00; G02B3/02; G02B3/08; A61F2002/1681; A61F2002/1683; A61L2430/00; A61L2430/16
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
69 words
An artificial intraocular lens for insertion into an eye comprising an optical body for placement across the optical axis of said eye for refracting images received via the cornea of said eye in order to focus said images on the retina of said eye, and an outer surface that encloses said optical body, is exposed to fluid within said eye, and has a refractive index no greater than 1.40.
Claim 2
Dependent Claim
69 words
An artificial intraocular lens for insertion into an eye comprising an optical body for placement across the optical axis of said eye for refracting images received via the cornea of said eye in order to focus said images on the retina of said eye, and an outer surface that encloses said optical body, is exposed to fluid within said eye, and has a refractive index no greater than 1.40.
Claim 3
Dependent Claim
31 words
The lens of claim 1 wherein said outer surface comprises a hydrogel polymer having an equilibrium water content of at least 65%, preferably at least 75%, most preferably at least 90%.
Claim 4
Dependent Claim
17 words
The lens of claim 2 wherein said polymer comprises a hydrophilic derivative of polyacrylic or polymethacrylic acid.
Claim 5
Dependent Claim
20 words
The lens of claim 3 wherein said derivative comprises a copolymer containing hydrophilic and hydrophobic groups organized in continuous sequences.
Claim 6
Dependent Claim
11 words
The lens of claim 2 wherein said polymer is covalently cross-linked.
Claim 7
Dependent Claim
14 words
The lens of claim 1 wherein said outer surface includes ionized negatively charged groups.
Claim 8
Dependent Claim
53 words
The lens of claim 1 wherein said optical body comprises an outer layer on which said outer surface lies, and an inner layer of different refractive index from said outer layer, said inner and outer layers meeting at an interface, more than 50% of the refraction by said lens occurring at said interface.
Claim 9
Dependent Claim
30 words
The lens of claim 2 or 7 wherein said outer layer comprises a swellable material having a gradient of swellability that decreases from a maximum value at said outer surface.
Claim 10
Dependent Claim
38 words
The lens of claim 1 wherein said optical body comprises a plurality of layers, said layers comprising materials of different refractive index, said layers being defined by surfaces a plurality of which have the same radius of curvature.
Claim 11
Dependent Claim
69 words
The lens of claim 7 wherein said inner layer has front and rear optical faces, said outer layer encloses said inner layer, said outer surface of said lens comprises front and rear exposed optical surfaces on said outer layer, and said outer layer comprises two internal optical faces that respectively cooperate with said front and rear optical faces of said inner layer to define a pair of refractive interfaces.
Claim 12
Dependent Claim
16 words
The lens of claim 10 wherein at least one said refractive interface is convex or concave.
Claim 13
Dependent Claim
12 words
The lens of claim 7 wherein said inner layer comprises a fluid.
Claim 14
Dependent Claim
12 words
The lens of claim 7 wherein said interface comprises a Fresnel-like surface.
Claim 15
Dependent Claim
12 words
The lens of claim 10 wherein one said refractive interface is planar.
Claim 16
Dependent Claim
27 words
The lens of claim 1 wherein the contour of said outer surface, and the front-to-back thickness of said lens, are the same as for a natural lens.
Claim 17
Dependent Claim
31 words
The lens of claim 1 wherein said lens can be temporarily altered in shape to permit said lens to be inserted through corneal or sclerotic incision no larger than 4 mm².
Claim 18
Dependent Claim
39 words
The lens of claim 7 wherein said outer layer comprises a pair of fluid filled chambers located respectively in front of and behind said inner layer, at least one said chamber being filled by a viscous, water heavy material.
Claim 19
Dependent Claim
49 words
The lens of claim 10 further comprising a rigid, resilient ring for defining the perimeter of said optical body, said outer layer comprising a pair of films formed on and spaced apart by said ring, and said inner layer being defined between the respective internal faces of said films.
Claim 20
Dependent Claim
32 words
The lens of claim 18 further comprising a spacer peg having its ends in contact with said internal faces for resisting movement of said films toward each other caused by intraocular pressure.
Claim 21
Dependent Claim
17 words
The lens of claim 19 wherein said peg is positioned on the optical axis of said eye.
Claim 22
Dependent Claim
20 words
The lens of claim 1 wherein said optical body comprises means for imparting different selective refractive powers to said lens.
Claim 23
Dependent Claim
24 words
The lens of claim 21 wherein said optical body comprises an enclosed chamber and said means for imparting includes fluids of different refractive index.
Claim 24
Dependent Claim
33 words
The lens of claim 20 wherein said means for imparting comprises a pair of layers within said optical body separated by a flexible interface, and means for shifting the contour of said interface.
Claim 25
Dependent Claim
42 words
The lens of claim 23 wherein said pair of layers comprise a chamber and said interface comprises a membrane that divides said chamber into two subchambers, and said means for shifting comprises means for pumping selectable volumes of fluid into said subchambers.
Claim 26
Dependent Claim
26 words
The lens of claim 21 wherein said optical body comprises a chamber and said means for imparting comprises a pump for delivering fluid into said chamber.
Claim 27
Dependent Claim
37 words
The lens of claim 25 wherein said pump comprises a membrane, and a magnet cooperating with said membrane, said magnet being positioned to interact with an external magnet placed in proximity to the cornea of said eye.
Claim 28
Dependent Claim
19 words
The lens of claim 1 further comprising a central optical zone of diameter between 1 mm and 5 mm.
Claim 29
Dependent Claim
17 words
The lens of claim 1 having a selectable refractive power, when implanted, between +5 and +30 diopters.
Claim 30
Dependent Claim
15 words
The lens of claim 1 wherein said refractive index is preferably no greater than 1.35.
Claim 31
Dependent Claim
26 words
The lens of claim 12 wherein said fluid is a gas having a composition corresponding to the partial pressure of gases dissolved in the intraocular medium.
Claim 32
Dependent Claim
29 words
The lens of claim 1 wherein the ratio of the lens refractive power in air to its refractive power when implanted is lower than 3, preferably lower than 1.5
Claim 33
Dependent Claim
23 words
The lens of claim 1 having a thickness before implantation between 0.2 and 1 mm and after implantation between 1 and 5 mm.
Claim 34
Dependent Claim
17 words
The lens of claim 1 having a diameter of the optical portion between 6 and 9 mm.
Claim 35
Dependent Claim
12 words
The lens of claim 17 wherein said chambers are inflatable following implantation.
Claim 36
Dependent Claim
43 words
The lens of claim 34 wherein said chambers comprise a dehydrated hydrophilic material not permeable through said outer surface, and said inflation occurs by absorption of water from the intraocular medium in said eye, through said outer surface, and into said hydrophilic material.
Claim 37
Dependent Claim
18 words
The lens of claim 1 having a density of between .95 and 1.05, preferably between 0.98 and 1.02.
Claim 38
Dependent Claim
14 words
The lens of claim 22 wherein said fluids are immiscible and of different density.
Claim 39
Dependent Claim
11 words
The lens of claim 22 wherein one said fluid is saline.
Claim 40
Dependent Claim
104 words
An artificial intraocular lens for insertion into an eye comprising an optical body for placement across the optical axis of said eye for refracting images received via the cornea of said eye in order to focus said images on the retina of said eye, an outer surface that encloses said optical body and is exposed to fluid within said eye, said optical body comprising an outer layer on which said outer surface lies and an inner layer having an internal refractive surface, and means for selectively changing the refractive power of said internal refractive surface by changing the contour of said internal refractive surface.
Claim 41
Dependent Claim
104 words
An artificial intraocular lens for insertion into an eye comprising an optical body for placement across the optical axis of said eye for refracting images received via the cornea of said eye in order to focus said images on the retina of said eye, an outer surface that encloses said optical body and is exposed to fluid within said eye, said optical body comprising an outer layer on which said outer surface lies and an inner layer having an internal refractive surface, and means for selectively changing the refractive power of said internal refractive surface by changing the contour of said internal refractive surface.
Claim 42
Dependent Claim
47 words
The lens of claim 39 wherein said inner layer comprises a pair of chambers separated by a flexible membrane forming said internal refractive surface, said chambers respectively containing two fluids having different refractive indexes, and means for controlling said fluids to change said contour of said membrane.
Claim 43
Dependent Claim
24 words
The lens of claim 40 wherein said means for controlling comprises means for changing the volumes or pressures of said fluids in said chamber.
Claim 44
Dependent Claim
27 words
The lens of claim 39 wherein said internal refractive surface occupies a convex contour for one refractive power and occupies a concave contour for another refractive power.
Claim 45
Dependent Claim
49 words
The lens of claim 40 further comprising two containers connected respectively to said chambers for holding supplies of said two fluids, each said container having a flexible wall, and means for shifting the contour of each said flexible wall to change the volumes of said fluids in said chambers.
Claim 46
Dependent Claim
22 words
The lens of claim 43 wherein said flexible walls comprise a single membrane that forms a common wall between said two containers.
Claim 47
Dependent Claim
19 words
The lens of claim 40 wherein said means for controlling comprises a magnet for triggering said change of contour.
Claim 48
Dependent Claim
18 words
The lens of claim 39 wherein said contour is changed without changing the configuration of said outer surface.
References Cited (Backward Citations)
No citation records indexed.
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