Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Eye prosthesis – Intraocular lens
Patent
1986-03-13
1989-08-29
Frinks, Ronald L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Eye prosthesis
Intraocular lens
A61F 216
Patent
active
RE0330396
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 portion 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
patent: 4494254 (1985-01-01), Lopez
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.
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.
The Simcoe Posterior Chamber Lens, Feb. 1980, 4 pp.
CILCO, advertising brochure, The Single-Piece Perspex Posterior Chamber Lens, Mar. 1981, 2 pp.
"Guide to Small-incision IOLS" by Dianne Herrin, Ocular Surgery News, Nov. 15, 1988, vol. 6, No. 22, pp. 14 and 15. (RE 80.038).
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