Multifocal contact lens with aspheric surface
First Claim
Patent Images
1. A contact lens comprising:
- a front surface and a back surface, one of the front surface and the back surface being an aspheric surface having an equatorial angle φ
wherein an eccentricity of the aspheric surface varies continuously as a function only of the angle φ
, wherein the eccentricity varies according to the following equation;
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Abstract
A contact lens is disclosed having a front surface and a back surface. The lens contains a continuously varying aspheric surface on one or more of these surfaces.
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Citations
18 Claims
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1. A contact lens comprising:
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a front surface and a back surface, one of the front surface and the back surface being an aspheric surface having an equatorial angle φ
wherein an eccentricity of the aspheric surface varies continuously as a function only of the angle φ
,wherein the eccentricity varies according to the following equation;
- View Dependent Claims (2, 3)
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4. A contact lens comprising:
a top portion and a bottom portion having an equatorial angle φ
, the top portion having a constant eccentricity as a function of the angle φ
, the bottom portion having an eccentricity that varies continuously as a function only of the angle φ
.- View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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9. The contact lens of claim 8 wherein the top portion and the bottom portion are on a back surface.
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10. The contact lens of claim 8 wherein the top portion and the bottom portion are on a front surface.
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11. The contact lens of claim 8 wherein the lens includes a ballast.
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12. A contact lens comprising:
a top portion and a bottom portion, and two opposite side portions, the top portion having a first eccentricity along a selected arc, the bottom portion having a second eccentricity different from the first eccentricity a long the selected arc and the side portions having an equatorial angle φ and
an eccentricity that that varies continuously as a function of the angle φ
along the selected arc.- View Dependent Claims (13, 14, 15, 16, 17)
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16. The contact lens of claim 15 wherein the top portion and the bottom portion are on a front surface.
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17. The contact lens of claim 16 wherein the lens includes a prism ballast.
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18. A contact lens comprising:
a front surface and a back surface, one of the front surface and the back surface being an aspheric surface having an equatorial angle φ
wherein an eccentricity of the aspheric surface varies continuously as a function of the angle φ
, wherein a near correction power is located between 30°
-150° and
a distance correction power is located between 210°
-330°
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Specification