Progressive power lens

Details Progressive power lens Progressive power lens

2005-01-04

2005-01-04

Schwartz, Jordan M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S177000

Reexamination Certificate

active

06837580

ABSTRACT:
A progressive power lens includes a convex front surface and a concave back surface which is also a progressive power surface. A pattern including distance and near reference area marks is printed on the concave back surface. The near reference area mark includes a closed curve and a scale arranged outside the closed curve. The closed curve is designed so as to enclose near reference areas of a plurality of progressive power lenses each having different dioptric power. The scale is designed so as to indicate the amount of inset of the progressive power lens.

REFERENCES:
patent: 4730924 (1988-03-01), Allard et al.
patent: 5960550 (1999-10-01), Weir et al.
patent: 20010035937 (2001-11-01), Mizuno
patent: 3-89416 (1991-09-01), None
patent: 5-64824 (1993-08-01), None
patent: 6-347615 (1994-12-01), None
patent: 2001-51241 (2001-02-01), None
patent: 2002-311396 (2002-10-01), None

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