Method for determining an ophthalmic lens

Details Method for determining an ophthalmic lens Method for determining an ophthalmic lens

2011-08-30

2011-08-30

Collins, Darryl J (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S177000, C351S161000, C351S169000

Reexamination Certificate

active

08007102

ABSTRACT:
A method for determining an ophthalmic lens includes choosing an initial lens with a first face and a second face and defining an initial surface for the second face of the lens with a central zone of diameter Diniand a peripheral zone of inner diameter Dracgreater than the diameter Diniof the central zone, each point of the central zone and the peripheral zone having an altitude defined with respect to an axis (Z) normal to the second face of the lens and having the centre of the central zone as its origin, the altitude of the peripheral zone being defined as the minimum of the points situated on the diameter Drac; the peripheral zone having a maximum radius of curvature comprised between the maximum radius of curvature of the first face and the maximum radius of curvature of the central zone.

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International Search Report, PCT/FR2007/001562, Feb. 13, 2008, 2 pages.
English Translation of the Written Opinion of the International Searching Authority, PCT/FR2007/001562, Mar. 28, 2009, 4 pages.

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