Ophthalmic lens with progressive addition of power and prism

Details Ophthalmic lens with progressive addition of power and prism Ophthalmic lens with progressive addition of power and prism

2007-05-15

2007-05-15

Sugarman, Scott J. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S177000

Reexamination Certificate

active

10543539

ABSTRACT:
The lens presents horizontal prismatic refractive power that varies progressively along the main progression meridian (MM′) with the addition of horizontal prismatic power being greater than 2 prismatic diopters in absolute value, this addition of horizontal prismatic power being defined by the difference between the horizontal prismatic refractive power at the reference point (L) of the far vision zone and the horizontal prismatic refractive power at the projection point (P′) of the reference point (P) of the near vision zone (VP) on the vertical line passing through the reference point (L) of the far vision zone.

REFERENCES:
patent: 2118132 (1938-05-01), Ames, Jr. et al.
patent: 2442849 (1948-06-01), Glazer
patent: 5270745 (1993-12-01), Pedrono
patent: 5708492 (1998-01-01), Kitani
patent: 6364481 (2002-04-01), O'Connor et al.
patent: 6505934 (2003-01-01), Menezes
patent: 6685316 (2004-02-01), Baumbach et al.
patent: 6808263 (2004-10-01), Welk et al.

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