Single vision lenses
First Claim
1. Spectacles includinga spectacle frame of the wrap-around type adapted to receive a pair of ophthalmic lenses such that each lens is rotated temporally about a vertical axis through the optical center thereof;
- and a pair of ophthalmic lenses, each lens including a front and back surface together forming a prescription (Rx) zone and a peripheral temporal zone, the front and/or back surface bearing a surface correction to at least partially adjust for errors including astigmatic errors.
1 Assignment
0 Petitions
Accused Products
Abstract
Optical lens element with a prescription zone, suitable for use in wraparound or protective type eyewear. The element may also include a peripheral vision zone, with no prismatic jump between the zones. Design methods for the prescription zone include temporally rotating a prescription section about a vertical axis through the optical center thereof, and/or decentring the optical axis of said prescription section relative to the geometric axis thereof, and providing partial surface correction for astigmatic and/or mean power errors. For prescription powers in the range −6.0 to +6.0 diopters with 0 to 3 cyl, the optical lens element may be designed such that its front surface can be mounted in a frame of constant curvature of at least 5.0 diopters, with its back surface providing good clearance from temples and eyelashes. Applications include ophthalmic sunglass lenses.
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Citations
8 Claims
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1. Spectacles including
a spectacle frame of the wrap-around type adapted to receive a pair of ophthalmic lenses such that each lens is rotated temporally about a vertical axis through the optical center thereof; - and
a pair of ophthalmic lenses, each lens including a front and back surface together forming a prescription (Rx) zone and a peripheral temporal zone, the front and/or back surface bearing a surface correction to at least partially adjust for errors including astigmatic errors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification