Multiple layer multifocal composite lens
First Claim
1. A lens, comprising:
- a distance vision zone, a far-intermediate vision zone, an intermediate vision zone and a near vision zone;
a first layer comprising a first index of refraction;
a second layer comprising a second index of refraction different than the first index of refraction;
a first surface of the first layer comprising a first incremental add power region contributing a first portion of a total add power of the lens; and
a second surface of the second layer comprising a second incremental add power region contributing a second portion of a total add power of the lens,wherein a portion of a boundary of the second incremental add power region forms an optical discontinuity adjacent to the distance vision zone of the lens,wherein the first and second incremental add power regions are positioned to be in optical communication so as to form the far-intermediate vision zone, the intermediate vision zone and the near vision zone.
4 Assignments
0 Petitions
Accused Products
Abstract
Aspects of the present invention provide multiple-layer (multi-layer) composite lenses comprising two or more materials and methods for making the same. A multi-layer composite lens of the present invention can use multiple surfaces (internal or external) to form optical elements that can contribute to a total desired add power. The multiple contributing optical elements can be aligned so as to be in optical communication to form multiple stable vision zones to enhance optical performance and the vision experience of the wearer. Distributing the total desired add power across multiple appropriately aligned optical elements that are in optical communication with one another can reduce the total distortion of the lens, minimize the number of optical discontinuities introduced, can reduce optical power jump as experienced by the wearer'"'"'s eye when traversing any discontinuity, and can reduce the visibility of any introduced optical discontinuity as perceived by an observer looking at the wearer.
-
Citations
20 Claims
-
1. A lens, comprising:
-
a distance vision zone, a far-intermediate vision zone, an intermediate vision zone and a near vision zone; a first layer comprising a first index of refraction; a second layer comprising a second index of refraction different than the first index of refraction; a first surface of the first layer comprising a first incremental add power region contributing a first portion of a total add power of the lens; and a second surface of the second layer comprising a second incremental add power region contributing a second portion of a total add power of the lens, wherein a portion of a boundary of the second incremental add power region forms an optical discontinuity adjacent to the distance vision zone of the lens, wherein the first and second incremental add power regions are positioned to be in optical communication so as to form the far-intermediate vision zone, the intermediate vision zone and the near vision zone. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11, 12, 13, 14, 15)
-
-
8. A lens, comprising:
-
an intermediate vision zone and a near vision zone; a first layer comprising a first index of refraction; a second layer comprising a second index of refraction different than the first index of refraction; a first surface of the first layer comprising a first incremental add power zone contributing a first portion of a total add power of the lens; and a second surface of the second layer comprising a second incremental add power zone contributing a second portion of the total add power of the lens, wherein the first incremental add power zone and the second incremental add power zone are positioned to be in optical communication so as to form the intermediate vision zone the near vision zone, wherein a portion of a boundary of the second incremental add power zone forms an optical discontinuity on the second surface, wherein the first and second incremental add power zones are discontinuous with respect to one another, wherein the intermediate vision zone and the near vision zone appear to be continuous when viewed by a wearer looking through the lens. - View Dependent Claims (9, 10, 16, 17, 18, 19, 20)
-
Specification