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US 2013/0141691 A1Published application
Progressive reading and intermediate distance lens defined by employment of a zernike expansion
AssigneeVisionware LLC
InventorJohn D. Lytle
Life of this patent
Estimating the term…
Abstract
There is provided a lens that includes a corridor having a width greater than or equal to about 6 millimeters. The lens has astigmatism less than or equal to about 0.5 diopter within the corridor. There is also provided an item of eyewear that includes such a lens, and a method for representing a surface of an ophthalmic lens.
Claims13
An item of eyewear, comprising:
- a lens holder;
- and
- a pair of progressive addition lenses situated in said lens holder to satisfy a span of interpupillary distances of at least 6 millimeters.
A method comprising:
- representing a surface for each of a pair of ophthalmic lenses by way of a Zernike expansion;
- and
- situating said pair of lenses in a lens holder to satisfy a span of interpupillary distances of at least 6 millimeters.
A method comprising:
- designing an ophthalmic lens,
- wherein said designing employs, as design parameters,
- (a) a predetermined boundary shape of said ophthalmic lens for ultimate use, and
- (b) a predetermined boundary size of said ophthalmic lens for ultimate use.
1 more element
Dependencies are inferred from the claim text.