US5815237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact lens and method for making the same
Assignee: Bausch and Lomb Inc
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Filing: 1997-05-14
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Granted: 1998-09-29
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Expires: 2017-05-14
Abstract
Abstract The present invention relates to a contact lens having a back side comprising a central zone and a peripheral zone located about the central zone, wherein the peripheral zone has a surface defined by an exponential function. Systems and methods for making such lenses are also provided.
Inventors
- 👤 Michael M. Vayntraub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:05
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A contact lens having a back side comprising a central zone and a peripheral zone located about the central zone, wherein said lens is characterized by the peripheral zone including at least one surface defined by an exponential function represented by the formula: y=Aexp.sup.(-Bx) +C wherein: x is the linear distance from the center of the lens, y is the saggital depth of the lens at a given x value, and A, B and C are coefficients.
Claim 2
Dependent Claim
77 words
A contact lens having a back side comprising a central zone and a peripheral zone located about the central zone, wherein said lens is characterized by the peripheral zone including at least one surface defined by an exponential function represented by the formula: y=Aexp.sup.(-Bx) +C wherein: x is the linear distance from the center of the lens, y is the saggital depth of the lens at a given x value, and A, B and C are coefficients.
Claim 3
Dependent Claim
25 words
The contact lens of claim 1 wherein the peripheral zone includes a plurality of concentric surfaces wherein each surface is defined as an exponential function.
Claim 4
Dependent Claim
24 words
The contact lens of claim 2 wherein the peripheral zone includes five sequential concentric surfaces wherein each surface is defined as an exponential function.
Claim 5
Dependent Claim
20 words
The contact lens of claim 2 wherein the concentric surfaces of the peripheral zone are connected along common tangent points.
Claim 6
Dependent Claim
21 words
The contact lens of claim 1 wherein the central and peripheral zones are connected along common points tangent to both zones.
Claim 7
Dependent Claim
18 words
The contact lens of claim 1 wherein the surface of the central zone is defined as an ellipse.
Claim 8
Independent Claim
87 words
A system for making contact lenses comprising: (a) a data processing system comprising: an input means for receiving data representing lens design parameters, and means for defining the shape of a back side of a contact lens based upon the lens design parameters, wherein the shape comprises a central zone and a periphery zone located about the central zone and having a shape defined as an exponential function; and (b) a lathe connected to the data processing system for cutting a lens corresponding to the defined shape.
Claim 9
Independent Claim
87 words
A system for making contact lenses comprising: (a) a data processing system comprising: an input means for receiving data representing lens design parameters, and means for defining the shape of a back side of a contact lens based upon the lens design parameters, wherein the shape comprises a central zone and a periphery zone located about the central zone and having a shape defined as an exponential function; and (b) a lathe connected to the data processing system for cutting a lens corresponding to the defined shape.
Claim 10
Independent Claim
63 words
A method for making contact lenses comprising the steps of: (a) providing data representing lens design parameters; (b) defining a shape based upon the lens design parameters wherein the shape comprises a central zone and a periphery zone located about the central zone and having a shape defined as an exponential function; and (c) cutting a lens surface corresponding to the defined shape.
Claim 11
Independent Claim
63 words
A method for making contact lenses comprising the steps of: (a) providing data representing lens design parameters; (b) defining a shape based upon the lens design parameters wherein the shape comprises a central zone and a periphery zone located about the central zone and having a shape defined as an exponential function; and (c) cutting a lens surface corresponding to the defined shape.
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) | 2001-09-28 | 2002-03-30 | 2002-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-28 | 2006-03-30 | 2006-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-28 | 2010-03-30 | 2010-09-29 | $7700.00 | Window Closed / Lapsed |