Lens implants for insertion in the human eye

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A61F 116, A61F 124

Patent

active

044765916

ABSTRACT:
A lens implant for insertion in the posterior chamber of human eye following an extra-capsular removal of the natural lens of the eye comprises a lens 1 of polymethyl methacrylate with two similar integral holding loops 2, which are flexible and resilient. Each loop 2 has a relatively stiff radial portion 3 followed by more flexible portions 5, 6 and 7 of varying curvatures. The free end 8 of each loop lies radially outwardly from the portion 5 of the other loop and the loops are so shaped that when the ends 8 are squeezed inwards into contact with the portions 5, the two loops 2 together form a substantially circular ring surrounding the lens concentrically. This facilitates insertion of the lens through an incision into the eye and, after insertion, the loops spring outwards again and engage either the anterior capsular flaps remaining after removal of the natural lens or the ciliary sulcus to hold the lens in position in the eye.

REFERENCES:
patent: 4363143 (1982-12-01), Callahan
patent: 4366582 (1983-01-01), Faulkner
patent: 4435855 (1984-03-01), Pannu
American IOL International, Intraocular Lenses, (Advertisement).
American IOL International, 15542 Graham St., Huntington Beach, CA 92647, Style 130 & 130A Posterior Chamber Lenses, Dec. 29, 1981, 3-13.
American Medical Optics, Model PC-80, Posterior Chamber, (Knolle).
Intraocular Lenses, (Advertisement), 4 pp., Sep. 1982, American Hospital Supply Corp., 1402 East Alton Ave., Irvine, CA 92714, 3-13.

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