Assymetrical progressive lens

Details Assymetrical progressive lens Assymetrical progressive lens

2008-10-22

2010-11-09

Collins, Darryl J (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S161000

Reexamination Certificate

active

07828433

ABSTRACT:
Progressive lens for viewing a field of vision having at least a first portion including objects in a first range of distances from a viewer and a second portion including objects in a second range of distances from the viewer, the lens comprising: at least two different power zones, the first power zone having lens power required by the viewer for the first range of distances of viewed objects from the viewer, and the second power zone having lens power required by the viewer for the second range of distances of viewed objects from the viewer, wherein the size and location on the lens of the first power zone correspond to size and location in the field of vision of the first portion, and wherein the size and location on the lens of the second power zone correspond to size and location in said field of vision of the second portion.

REFERENCES:
patent: 4315673 (1982-02-01), Guilino et al.
patent: 6149271 (2000-11-01), Menezes et al.
patent: 2005/0280775 (2005-12-01), Esser et al.

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