Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Eye prosthesis – Intraocular lens
Patent
1998-05-28
2000-07-04
Nguyen, Dinh X.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Eye prosthesis
Intraocular lens
623 64, 623 642, 623 643, A61F 216
Patent
active
060832614
ABSTRACT:
An intraocular lens with crossed haptics, suitable for implantation in either a phakic or an aphakic eye and a method for implanting and releasing the haptics after implantation in the eye. The lens comprises a very thin, deformable optic having two pairs of haptics attached to the optic by means of two stems 180.degree. apart on the circumference of the optic, each tapering to a tip having one haptic each connected to opposite edges of the stem. Each haptic has a footplate defined at the free end of the haptic. Each haptic sweeps about the periphery of the optic so that the angle subtended by a radial line extending from the center of the optic through the center of a footplate and a second radial line extending from the center of the optic through the center of the stem to which it attaches is about 135.degree.. The lens is symmetrical about an axis extending through the opposing stems, with each haptic crossing either over or under the haptic connected to the opposing stem on the same side of the axis. The lens is inserted into the eye by using a previously prepared seriated suture joined by a viscoelastic material to fold the lens in a tubular shape and compress the haptics, inserting the lens in the eye, centering the lens, dissolving the viscoelastic material with saline solution, and removing the seriated suture by pulling a free end of the suture left outside the eye during insertion. When released, the footplates of the four haptics lie on a circle concentric with the optic, subtending four substantially equal arcs.
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Callahan J. Scott
Callahan Wayne B.
Lanquist, Jr. Edward D.
Nguyen Dinh X.
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