Progressive addition lenses
First Claim
Patent Images
1. A lens comprising:
- a.) an optical preform comprising a progressive addition surface having a near vision zone and a first dioptric add power; and
b.) one or more continuous optical elements having a second dioptric add power at least one of the one or more continuous optical elements disposed so as to overlap the near vision zonewherein the dioptric add power of the lens is the sum of the first and second dioptric add powers.
4 Assignments
0 Petitions
Accused Products
Abstract
The invention provides progressive addition lenses in which lens unwanted astigmatism is reduced and channel width through the intermediate and near vision zones is increased as compared to conventional progressive addition lenses. This result is achieved by combining a progressive addition surface with a first dioptric add power with at least one optical element that provides additional dioptric add power to the lens.
131 Citations
22 Claims
-
1. A lens comprising:
-
a.) an optical preform comprising a progressive addition surface having a near vision zone and a first dioptric add power; and b.) one or more continuous optical elements having a second dioptric add power at least one of the one or more continuous optical elements disposed so as to overlap the near vision zone wherein the dioptric add power of the lens is the sum of the first and second dioptric add powers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A spectacle lens comprising:
-
a.) an optical preform comprising a progressive addition surface having a near vision zone having a center, the progressive addition surface having a dioptric add power of about +1.00 to about +2.75 diopters; and b.) one or more continuous optical elements having a center and a dioptric add power of about +0.25 to about +2.00, at least one of the one or more continuous optical elements disposed so that the center of the element coincides with the center of the near vision zone and the one or more continuous optical elements is on a surface opposite the progressive addition surface, in a layer between the progressive addition surface and the surface opposite the progressive addition surface, or a combination thereof wherein the dioptric add power of the lens is the sum of the first and second dioptric add powers. - View Dependent Claims (10, 11)
-
-
12. A lens comprising:
-
a.) an optical preform comprising a progressive addition surface having a near vision zone and a first dioptric add power; and b.) two or more discontinuous optical elements having a second dioptric add power, at least one of the two or more discontinuous optical elements disposed so as to overlap the near vision zone wherein the dioptric add power of the lens is the sum of the first and second dioptric add powers. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
-
20. A spectacle lens comprising:
-
a.) an optical preform comprising a progressive addition surface having a near vision zone having a center, the progressive surface having a dioptric add power of about +1.00 to about +2.75 diopters; and b.) two or more discontinuous optical elements having a center and a dioptric add power of about +0.25 to about +2.00, the center of at least one of the two or more discontinuous optical elements disposed so as to coincide with the center of the near vision zone and the two or more discontinuous optical elements are located on the progressive surface, a surface opposite the progressive addition surface, in a layer between the progressive addition surface and the surface opposite the progressive addition surface, or a combination thereof wherein the dioptric add power of the lens is the sum of the first and second dioptric add powers. - View Dependent Claims (21, 22)
-
Specification