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Biomedical: Intraocular, Pre-Placed, Anterior Chamber Lenses

Client

Vision Laboratories, Inc., New York City, N.Y.

Problem

The removal of the eye crystalline lens reduces the organ's structural integrity and exposes the critical vitreous body to injury during implantaion of an intraocular lens. A lens design was desired that would allow the lens to be implanted prior to the extraction of the cataract and not interfere with the operation.

Solution

The lens shown in the photograph has the desired characteristics. In addition, it is made of grafted polymethylmethacrylate to reduce reflections. The lens is supported only at one side by the loop legs and elastically pivots to allow the cryoextraction of the diseased crystalline. Viscosurgery using sodium hyaluronate (HEALON) prevents corneal endothelium abrasion during cryoextraction. Design has been successfully tested by Dr. David Miller, of Beth-Israel Hospital, on rabbits.

Picture of the Chamber Lenses