1978-12-01
1981-01-13
Frinks, Ronald L.
A61F 116, A61F 124
Patent
active
042440602
ABSTRACT:
An intraocular lens includes a lens body and a plurality of lens-centering filaments extending outwardly in a common plane from spaced rim portions of the lens body. The lens is particularly adapted for implantation in the eye posterior chamber after extracapsular cataract extraction. When the filament ends are inserted into the cleft of the capsule, the resilience of the filaments centers the lens behind the pupil. An annular lip having at least one opening projects from the rear face of the lens body and seats against the posterior capsule. A discission can be easily performed without dislodging the lens by inserting the discission instrument through the opening in the lip and into the space behind the lens. The lip also limits the progress of vitreous humor toward the anterior chamber after a discission, and may limit lens fiber growth on the posterior capsule within the lip region. In an optional embodiment, fluid flow channels are provided through the lens to prevent pupillary block.
REFERENCES:
patent: 3866249 (1975-02-01), Flom
patent: 4014049 (1977-03-01), Richards et al.
patent: 4041552 (1977-08-01), Ganias
patent: 4073014 (1978-02-01), Poler
patent: 4110848 (1978-09-01), Jensen
patent: 4159546 (1979-07-01), Shearing
"The Lens", (Advertisement), Shearing Posterior Chamber Lens Model 101.
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