Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Eye prosthesis – Intraocular lens
Patent
1987-06-10
1989-07-11
Frinks, Ronald L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Eye prosthesis
Intraocular lens
264 11, 264 26, 264319, A61F 216, B29D 1100
Patent
active
048468320
ABSTRACT:
A soft and elastic intracameral lens, the back surface of which is formed by a continuous rotation-symmetric convex surface and the front surface comprises a central convex surface of sphere or quadric rotation-symmetric body linked on the diameter of 4 to 8 mm, preferably through a rounded transition, to a concave ring surface of a sphere or a toroid, whereas the distance between the concave ring surface and the back surface is 0.05 to 1.5 mm.
The intracameral lens according to the invention is manufactured by charging a mold, which has the negative shape of the required front surface of the lens and is provided at the periphery with a sharp edge protruding by 0.05 to 1.5 mm above the end of the peripheral ring surface, with a monomer mixture as high as above the sharp edge to form a continuous convex meniscus and the mold with the monomer mixture is then exposed to polymerization conditions.
REFERENCES:
patent: 4172297 (1979-10-01), Schlegel
patent: 4424597 (1984-01-01), Schlegel
patent: 4449257 (1984-05-01), Koeniger
patent: 4556998 (1985-12-01), Siepser
patent: 4642114 (1987-02-01), Rosa
"The Soft Intraocular Implant", by K. R. Merta et al., The Cornea in Health & Disease (VIth Congress of The European Society of Ophthalmology), Royal Society of Medicine International Congress & Symposium Series No. 40, published jointly by Academic Press, Inc. (London), Ltd. and Tue Royal Society of Medicine, Aug. 1981, pp. 859-863.
Ceskoslovenska akademie ved.
Frinks Ronald L.
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