Bifocal plastic lens

Details Bifocal plastic lens Bifocal plastic lens

2008-12-02

2010-10-19

Schwartz, Jordan M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S172000

Reexamination Certificate

active

07815309

ABSTRACT:
A bifocal plastic lens having a bench lens and a small lens with different refractive powers. The small lens not protruding above a surface of the bench lens, a boundary between the constituent lenses being difficult to see. The small lens may be provided on a preparatory lens member including the small lens. Alternatively, the preparatory lens member has a concave portion for a small lens molding surface. A resin having a higher refractive index than a resin constituting other portions of the lens is adhered to a surface provided with the small lens or the concave portion to be the small lens molding surface in the preparatory lens member, and is cured and integrated.

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