[Compensating presbyopia: a new physiological progressive lens (author's transl)]. / Compensation de la presbytie. Un nouveau verre progressif physiologique.

After discussing the functional disadvantages arising after correction of presbyopia with uni--or multifocal lenses, the authors describe the optical and physiological advantages of a lens with progressively increasing power. The principal qualities of these physiologically progressive lenses are studies, and the results of a preliminary survey concerning their use are analysed. The indications for, and adaptation and tolerance of these lenses are outlined.