Method of making multi-focus ophthalmic lens

Abstract From the Canadian patent

A method of producing multifocal ophthalmic lenses having a near vision minor lens element adhesively secured to the ocular surface of a major lens is disclosed. The ocular surface of the major lens is finished to provide an ophthalmic prescription lens. This ocular surface may have a spherical cylindrical, or prismatic curvature, or any combination thereof and thus generally may have a complex toric curvature. The minor lens has a predetermined "add power", to provide a near vision segment on the major lens, and preferably is flexible or is made, flexible as by heating, so that it can conform to the shape of the toric curve on the ocular surface of the major lens without distorition or …