Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Reexamination Certificate
2007-12-18
2007-12-18
Sugarman, Scott J. (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
Reexamination Certificate
active
10483488
ABSTRACT:
A method for displaying an optical performance preferably applicable to also an axially asymmetric spectacle lens is provided. First, a clear visual region of the spectacle lens is determined using an evaluation function which evaluates the optical performance of the spectacle lens. Next, a clear visual angle which depends on a size of the clear visual region corresponding to a vertex angle of a spherical cone is calculated when the spherical cone which has an equal solid angle with a solid angle including the determined clear visual region from a center of rotation of an eye and which is symmetrical to an optical axis of the spectacle lens is assumed. Next, the calculated clear visual angle is expressed by a unit of degree.
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Collins Darryl J.
Hoya Corporation
Sugarman Scott J.
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