Variable spectacle lens for varying the focal length comprises rear ring spaced from the front ring by hinges and with an actuator while inside diameter has line of contact between free area of the membrane

摘要

The spectacle lens comprises rigid lens bonded or otherwise attached to the rear ring (17) and spaced from the front ring (14) by hinges and an actuator. A flexible seal (13) us made of a durable elastomer extending between the rear and front ring. The inside diameter (16'') has line of contact between the free area of the membrane (15) and support (16). The shape of the interface between liquid (21) and lens (12) has no effect.