SPECTACLE LENS AND DESIGN METHOD OF SPECTACLE LENS

Abstract: at least one of two optical surfaces respectively located on an object side and an eyeball side has: a base surface configured to cause a light beam incident from the object side to be emitted toward the eyeball side, and to converge at a position a on a retina of an eyeball; and a plurality of defocus surfaces configured to cause a light beam incident from the object side to be emitted toward the eyeball side, and to converge at a position b that is farther away from the object side than the position a is, the base surface is a convex surface, and at least one of the defocus surfaces is a non-concave surface.

Inventor(s): Shohei MATSUOKA

CPC Classification: G02C7/022 ({Ophthalmic lenses having special refractive features achieved by special materials or material structures ( takes precedence)})

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