Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate
2011-06-14
2011-06-14
Collins, Darryl J (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
C351S161000, C351S164000, C351S168000
Reexamination Certificate
active
07959285
ABSTRACT:
A subject matter is to provide an efficient method for designing a progressive refraction lens in consideration of not only its optical performance but also its appearance performance. The method for designing the progressive refraction lens includes a step (S030) for determining addition power of an entire lens that is a summation of addition power of a front surface and that of a back surface and a step (S040) for determining the addition power of the front surface. The method for designing the progressive refraction lens is characterized in determining to make the addition power of the front surface not less than 0 but smaller than that of the entire lens in the case that the appearance performance is considered to be more important than the optical performance while determining to make the addition power of the front surface larger than that of the entire lens in the case that the optical performance is considered to be more important than the appearance performance.
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European Search Report dated Oct. 7, 2010.
Collins Darryl J
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Nikon-Essilor Co., Ltd.
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