Multifocal contact lens with aspheric surface
First Claim
Patent Images
1. A contact lens comprising:
- a front surface, a back surface and an apex, the lens defining a series of adjacent points at a fixed distance from the apex, the series of adjacent points on the lens having a continuously varying power, the series of adjacent points extending across an arc of at least 120°
.
3 Assignments
0 Petitions
Accused Products
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.
237 Citations
30 Claims
-
1. A contact lens comprising:
a front surface, a back surface and an apex, the lens defining a series of adjacent points at a fixed distance from the apex, the series of adjacent points on the lens having a continuously varying power, the series of adjacent points extending across an arc of at least 120°
.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29)
-
12. A contact lens comprising:
a front surface and a back surface, one of the front surface and the back surface being an aspheric surface wherein an eccentricity of the aspheric surface varies continuously as a function of the angle φ
.
-
16. A contact lens comprising:
a top portion and a bottom portion, 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 of the angle φ
.
-
24. 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 along the selected arc and the side portions having an eccentricity that that varies continuously as a function of the angle φ
along the selected arc.
-
30. A contact lens comprising:
a front surface and a back surface, one of the front surface and the back surface being an aspheric surface 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°
.
Specification