Patent US4748052A successfully refreshed from Google Patents.
Patent US4923296A successfully refreshed from Google Patents.
US4923296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oriented simultaneous vision bifocal contact lenses or the like utilizing introaocular suppression of blur
Assignee: Bausch and Lomb Inc
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Filing: 1988-07-14
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Granted: 1990-05-08
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Expires: 2008-07-14
Abstract
Abstract A lens system comprises a pair of corrective lenses whose surfaces are divided into a series of substantially discrete near and distant vision zones whose dimensions and positions are such that, relative to the line of sight of the right and left eye respectively, each zone on one lens containing the distance power correction corresponds to a similar zone on the other lens containing the near power correction.
Inventors
- 👤 Paul M. Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:46
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/041; G02C7/042; G02C7/024; G02C7/027; G02C7/045; G02C7/048; G02C7/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A lens system for correcting near and distant vision in humans, comprising: a pair of contact lenses whose optical surfaces are divided into at least two substantially discrete zones, the junction of said zones extending from edge to edge of each lens through substantially the optical center of said lenses, but not along a vertical axis, the position of said discrete zones which, when said lenses are worn one upon the right eye and one upon the left eye, are such that relative to the line of sight of the wearer each zone of one lens defining a distance power correction corresponds to a similar zone defining a near power correction on the other lens.
Claim 2
Dependent Claim
115 words
A lens system for correcting near and distant vision in humans, comprising: a pair of contact lenses whose optical surfaces are divided into at least two substantially discrete zones, the junction of said zones extending from edge to edge of each lens through substantially the optical center of said lenses, but not along a vertical axis, the position of said discrete zones which, when said lenses are worn one upon the right eye and one upon the left eye, are such that relative to the line of sight of the wearer each zone of one lens defining a distance power correction corresponds to a similar zone defining a near power correction on the other lens.
Claim 3
Dependent Claim
24 words
The lens system as set forth in claim 1 wherein said contact lenses are divided along a substantially horizontal axis into two vision zones.
Claim 4
Dependent Claim
39 words
The lens system as set forth in claim 2, wherein said horizontal axis does not coincide with said optical axis and divides said contact lenses into unequal segments with corresponding segments of each lens being of substantially similar size.
Claim 5
Dependent Claim
22 words
The lens system as set forth in claim 1 wherein said contact lenses are divided into an even number of discrete zones.
Claim 6
Dependent Claim
22 words
The lens system as set forth in claim 3 wherein said contact lenses are divided into an odd number of discrete zones.
Claim 7
Dependent Claim
24 words
The lens system as set forth in claim 1 wherein each of said lenses is provided with means for controlling orientation on the eyes.
Claim 8
Dependent Claim
115 words
A lens system for correcting near and distant vision in humans, comprising: a pair of intraocular lenses whose optical surfaces are divided into at least two substantially discrete zones, the junction of said zones extending from edge to edge of each lens through substantially the optical center of said lenses, but not along a vertical axis, the position of said discrete zones which, when said lenses are worn one in the right eye and one in the left eye, are such that relative to the line of sight of the wearer each zone of one lens defining a distance power correction corresponds to a similar zone defining a near power correction on the other lens.
Claim 9
Dependent Claim
115 words
A lens system for correcting near and distant vision in humans, comprising: a pair of intraocular lenses whose optical surfaces are divided into at least two substantially discrete zones, the junction of said zones extending from edge to edge of each lens through substantially the optical center of said lenses, but not along a vertical axis, the position of said discrete zones which, when said lenses are worn one in the right eye and one in the left eye, are such that relative to the line of sight of the wearer each zone of one lens defining a distance power correction corresponds to a similar zone defining a near power correction on the other lens.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |