Posterior chamber intra-ocular transplant device

Details Posterior chamber intra-ocular transplant device Posterior chamber intra-ocular transplant device

1979-10-26

1981-11-10

Crowder, Clifford D.

A61F 116, A61F 124

Patent

active

042989949

ABSTRACT:
An intra-ocular implantable device and a method of surgically implanting such device in which upper and lower haptic loops are attached to a lens on opposite sides thereof for contacting the ciliary sulcus (or capsular bag) to position the lens in the posterior chamber. The lower loop has a stiffness greater than the upper loop and the lens has a vertical dimension greater than its horizontal dimension to ensure proper positioning of the lens. The lens has a rear convex surface for facilitating discission after implantation and optical advantages. Upper and lower bores in the front surface of the lens extend at an angle to the vertical of, for example, 15.degree. to 20.degree. to permit fixation by a fine spatula for manipulation of the device during implantation. The edges of the lens between the loops include straight line portions for guiding the device during insertion and requiring minimum incision.

REFERENCES:
patent: 3866249 (1975-02-01), Flom
patent: 3913148 (1975-10-01), Potthast
patent: 3922728 (1975-12-01), Krasnor
patent: 4056855 (1977-11-01), Kelman
patent: 4073014 (1978-02-01), Poler
patent: 4087866 (1978-05-01), Choyce et al.
patent: 4159546 (1979-07-01), Shearing
patent: 4174543 (1979-11-01), Kelman
patent: 4214585 (1980-07-01), Bailey, Jr.
Jalie, M.; "The Design of Intra-ocular Lenses", article published by the British Optical Association, pp. 1-21, 5/1978.
Tennant; A Lens for all Seasons (Book), copyright 1976, pp. 46-51 and pp. 62, 63, 66, 67.

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