Patent US5619289A successfully refreshed from Google Patents.
US5619289A
Expired / Lapsed
US
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Multifocal contact lens
Assignee: Permeable Technologies Inc
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Filing: 1994-09-16
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Granted: 1997-04-08
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Expires: 2014-09-16
Abstract
Abstract A multifocal contact lens customized for a patient has, in accordance with the present invention, an anterior side with a power curve defined in part by a (i) central aspheric surface, (ii) an inner annular surface contiguous with the central aspheric surface, (iii) a second annular surface contiguous along a radially inner periphery with the inner annular aspheric surface, and (iv) an outer annular surface contiguous along a radially inner periphery with the second annular aspheric surface. Each of the annular surfaces is concentric or coaxial with the central aspheric surface. The central aspheric surface corresponds to a distance vision correction zone. The inner annular surface is an aspheric surface corresponding to a progressive add zone with a standard eccentricity between approximately -1.5 and approximately -5.0. The second annular surface corresponds to a near vision correction zone, and the outer annular surface corresponds to a distant vision correction zone.
Inventors
- 👤 Leonard Seidner
- 👤 Maurice Poster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:01
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041; G02C7/044; B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00086; G02C7/042; G02C7/043
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
140 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a (i) central aspheric surface, (ii) an aspheric inner annular surface contiguous with said central aspheric surface, (iii) a second annular surface contiguous along a radially inner periphery with said aspheric inner annular surface, and (iv) an outer annular surface contiguous along a radially inner periphery with said second annular surface, each of the annular surfaces being concentric or coaxial with said central aspheric surface, said central aspheric surface corresponding to a distance vision correction zone, said aspheric inner annular surface corresponding to a progressive add zone with a standard eccentricity between approximately -1.5 and approximately -5.0, said second annular surface corresponding to a near vision correction zone, and said outer annular surface corresponding to a distant vision correction zone.
Claim 2
Dependent Claim
140 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a (i) central aspheric surface, (ii) an aspheric inner annular surface contiguous with said central aspheric surface, (iii) a second annular surface contiguous along a radially inner periphery with said aspheric inner annular surface, and (iv) an outer annular surface contiguous along a radially inner periphery with said second annular surface, each of the annular surfaces being concentric or coaxial with said central aspheric surface, said central aspheric surface corresponding to a distance vision correction zone, said aspheric inner annular surface corresponding to a progressive add zone with a standard eccentricity between approximately -1.5 and approximately -5.0, said second annular surface corresponding to a near vision correction zone, and said outer annular surface corresponding to a distant vision correction zone.
Claim 3
Dependent Claim
71 words
The lens defined in claim 1 wherein said central aspheric surface has a diameter between approximately 1.5 mm and approximately 2.5 mm, said aspheric inner annular surface has an outer diameter between approximately 2.0 mm and approximately 3.5 mm, said second annular surface has an outer diameter between approximately 2.3 mm and approximately 4.0 mm, and said outer annular surface has an outer diameter between approximately 3.5 and approximately 8.0 mm.
Claim 4
Dependent Claim
56 words
The lens defined in claim 2 wherein said central aspheric surface has a diameter of approximately 2.2 mm, said aspheric inner annular surface has an outer diameter of approximately 2.8 mm, said second annular surface has an outer diameter of approximately 3.5 mm, and said outer annular surface has an outer diameter of approximately 8.0 mm.
Claim 5
Dependent Claim
21 words
The lens defined in claim 3 wherein said central aspheric surface has a standard eccentricity between approximately -0.6 and approximately -1.0.
Claim 6
Dependent Claim
17 words
The lens defined in claim 4 wherein said central aspheric surface has an eccentricity of approximately -0.8.
Claim 7
Dependent Claim
22 words
The lens defined in claim 5 wherein said aspheric inner annular surface has a standard eccentricity between approximately -1.5 and approximately -4.0.
Claim 8
Dependent Claim
19 words
The lens defined in claim 6 wherein said second annular surface and said outer annular surface are both spheric.
Claim 9
Dependent Claim
38 words
The lens defined in claim 7 wherein said anterior side has an annular lenticular area with an inner periphery contiguous with said outer annular surface and with an outer diameter between approximately 8.0 mm and approximately 14.5 mm.
Claim 10
Dependent Claim
43 words
The lens defined in claim 8 wherein said central aspheric surface has a center and a substantially circular peripheral edge, said central aspheric surface having a maximum change in power of approximately 1/2 diopter from said center radially outwardly to said peripheral edge.
Claim 11
Dependent Claim
13 words
The lens defined in claim 9, further comprising an aspheric cornea-fitting posterior surface.
Claim 12
Dependent Claim
20 words
The lens defined in claim 10 wherein said posterior surface has an eccentricity magnitude ranging from 0.0 to about 1.0.
Claim 13
Dependent Claim
11 words
The lens defined in claim 11 manufactured from a hydrophilic polymer.
Claim 14
Dependent Claim
37 words
The lens defined in claim 1 wherein said central aspheric surface has a standard eccentricity between approximately -0.6 and approximately -1.0 and said aspheric inner annular surface has a standard eccentricity between approximately -1.5 and approximately -4.0.
Claim 15
Dependent Claim
17 words
The lens defined in claim 13 wherein said central aspheric surface has an eccentricity of approximately -0.8.
Claim 16
Dependent Claim
25 words
The lens defined in claim 1 wherein said anterior side has an annular lenticular area with an inner periphery contiguous with said outer annular surface.
Claim 17
Dependent Claim
19 words
The lens defined in claim 1 wherein said second annular surface and said outer annular surface are both spheric.
Claim 18
Dependent Claim
43 words
The lens defined in claim 1 wherein said central aspheric surface has a center and a substantially circular peripheral edge, said central aspheric surface having a maximum change in power of approximately 1/2 diopter from said center radially outwardly to said peripheral edge.
Claim 19
Dependent Claim
23 words
The lens defined in claim 1, further comprising an aspheric cornea-fitting posterior surface having an eccentricity magnitude ranging from 0.0 to about 1.0.
Claim 20
Dependent Claim
11 words
The lens defined in claim 1 manufactured from a hydrophilic polymer.
Claim 21
Dependent Claim
43 words
The lens defined in claim 1 wherein said aspheric inner annular surface has a maximum change in refractive power of approximately three and one-half diopters as measured radially from an inner periphery of said aspheric inner annular surface to an outer periphery thereof.
Claim 22
Dependent Claim
124 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a (i) central aspheric surface, (ii) an aspheric inner annular surface contiguous with said central aspheric surface, (iii) a second annular surface contiguous along a radially inner periphery with said aspheric inner annular surface, and (iv) an outer annular surface contiguous along a radially inner periphery with said second annular surface, each of the annular surfaces being concentric or coaxial with said central aspheric surface, said aspheric inner annular surface corresponding to a progressive add zone with a standard eccentricity having a magnitude between approximately 1.5 and approximately 5.0, said central aspheric surface having an eccentricity with a magnitude of at least approximately 0.6.
Claim 23
Dependent Claim
124 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a (i) central aspheric surface, (ii) an aspheric inner annular surface contiguous with said central aspheric surface, (iii) a second annular surface contiguous along a radially inner periphery with said aspheric inner annular surface, and (iv) an outer annular surface contiguous along a radially inner periphery with said second annular surface, each of the annular surfaces being concentric or coaxial with said central aspheric surface, said aspheric inner annular surface corresponding to a progressive add zone with a standard eccentricity having a magnitude between approximately 1.5 and approximately 5.0, said central aspheric surface having an eccentricity with a magnitude of at least approximately 0.6.
Claim 24
Dependent Claim
71 words
The lens defined in claim 21 wherein said central aspheric surface corresponds to a distance vision correction zone, said second annular surface corresponds to a near vision correction zone, and said outer annular surface corresponds to a distant vision correction zone, the standard eccentricity of said aspheric inner annular surface being between approximately -1.5 and approximately -5.0, said inner annular surface having a standard eccentricity between approximately -1.5 and approximately -4.0.
Claim 25
Dependent Claim
24 words
The lens defined in claim 21 wherein said central aspheric surface has a standard eccentricity with a magnitude between approximately 0.6 and approximately 1.0.
Claim 26
Dependent Claim
29 words
The lens defined in claim 23 wherein said central aspheric surface corresponds to a distant vision correction zone and has a standard eccentricity between approximately -0.6 and approximately -1.0.
Claim 27
Dependent Claim
25 words
The lens defined in claim 21 wherein said anterior side has an annular lenticular area with an inner periphery contiguous with said outer annular surface.
Claim 28
Dependent Claim
79 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a central aspheric surface and an annular surface contiguous and coaxial or concentric with said central aspheric surface, said annular surface being an aspheric surface corresponding to a progressive add zone with a standard eccentricity having a magnitude between approximately 1.5 and approximately 5.0, said central aspheric surface having an eccentricity with a magnitude of at least approximately 0.6.
Claim 29
Dependent Claim
79 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a central aspheric surface and an annular surface contiguous and coaxial or concentric with said central aspheric surface, said annular surface being an aspheric surface corresponding to a progressive add zone with a standard eccentricity having a magnitude between approximately 1.5 and approximately 5.0, said central aspheric surface having an eccentricity with a magnitude of at least approximately 0.6.
Claim 30
Dependent Claim
41 words
The lens defined in claim 26 wherein said central aspheric surface corresponds to a distance vision correction zone, said annular surface being an aspheric surface corresponding to a progressive add zone with a standard eccentricity between approximately -1.5 and approximately -5.0.
Claim 31
Dependent Claim
53 words
The lens defined in claim 27 wherein said central aspheric surface has a diameter between about 1.5 mm and 2.8 mm, said annular surface having an outer diameter between about 1.5 mm and 8.0 mm, the outer diameter of said annular surface being larger than the outer diameter of said central aspheric surface.
Claim 32
Dependent Claim
81 words
The lens defined in claim 27 wherein said annular surface is an inner annular surface on said anterior side, said anterior side also having a second annular surface contiguous along a radially inner periphery with said inner annular surface, said second annular surface corresponding to a near vision correction zone, said anterior side also having an outer annular surface contiguous along a radially inner periphery with said second annular surface, said outer annular surface corresponding to a distant vision correction zone.
Claim 33
Dependent Claim
88 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a (i) central aspheric surface, (ii) an inner annular surface contiguous with said central aspheric surface, and (iii) a second annular surface contiguous along a radially inner periphery with said inner annular surface, each of the annular surfaces being concentric or coaxial with said central aspheric surface, said central aspheric surface corresponding to a near vision correction zone with a standard eccentricity between approximately +1.5 and approximately +5.0.
Claim 34
Dependent Claim
88 words
A multifocal contact lens customized for a patient, having an anterior side with a power curve defined in part by a (i) central aspheric surface, (ii) an inner annular surface contiguous with said central aspheric surface, and (iii) a second annular surface contiguous along a radially inner periphery with said inner annular surface, each of the annular surfaces being concentric or coaxial with said central aspheric surface, said central aspheric surface corresponding to a near vision correction zone with a standard eccentricity between approximately +1.5 and approximately +5.0.
Claim 35
Dependent Claim
43 words
The lens defined in claim 30 wherein said inner annular surface is an aspheric surface with a standard eccentricity between approximately +1.5 and approximately +3.5, said second annular surface being an aspheric surface with a standard eccentricity between approximately +0.3 and approximately +1.0.
Claim 36
Dependent Claim
43 words
The lens defined in claim 31 wherein said central aspheric surface has a standard eccentricity between approximately +3.0 and +5.0, said inner annular surface has a standard eccentricity of approximately 2.5, and said second annular surface has a standard eccentricity of approximately +0.8.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-07 | 2000-10-07 | 2001-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-07 | 2004-10-07 | 2005-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-07 | 2008-10-07 | 2009-04-08 | $7700.00 | Window Closed / Lapsed |