(under subclass 159) Subject matter wherein the lens is specially adapted to use after the operation for cataract and corrects by being very powerful.
(1) Note. The lens is usually composite comprising a double convex and a concavo-convex lens secured together, or the lens may comprise a lenticular support or border portion in which a strong vision lens is mounted. The above lens may be unifocal or may comprise lens elements of different refractive indices as to provide a long vision and a reading section, the diopter range usually being between 10 and 18.
SEE OR SEARCH THIS CLASS, SUBCLASS:
160, for cateract-correcting combinations of contact lenses and spectacle glasses.
