process for the production of ophthalmic lenses english.

摘要

A method of producing multifocal ophthalmic lenses having a near vision minor lens element (52) adhesively secured to the ocular surface (12) of a major lens (10) is disclosed. The ocular surface of the major lens (10) is finished to provide an ophthalmic prescription lens. The minor lens (52) has a predetermined "add power", to provide a near vision segment on the major lens, and is flexible, or is made flexible as by heating, so that it can conform to the shape of the curve on the ocular surface of the major lens without distortion or change in its add power. An adhesive material (54) is placed on the major lens, and the minor lens (52) is carefully positioned and gently pressed against it so that it conforms to the curvature of the major lens.