Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1976-09-16
1978-10-24
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351160, G02C 704
Patent
active
041218850
ABSTRACT:
A new concept in polymeric prosthetic devices having a portion thereof composed of a hydrophilic polymer is described herein in which distortions and stresses upon the device due to water absorption are minimized or eliminated. Physical properties of the various portions of the device may thus be varied to provide the particular physical parameters required. Compositions of matter and methods of manufacturing the novel prosthetic devices are described. The composition of matter is a polymer which includes a water soluble solid inert substance removable by exposure to water during hydration of the hydrophilic portion of the device, thus eliminating distortions and stresses therein. The hydrophilic polymer described is useful, for example, as one component part of such prosthetic devices as a hard-soft contact lens, cardiovascular implants, etc. useful in aqueous environment wherein stress and deformation of the polymer shape due to hydration must be minimized.
REFERENCES:
patent: 2241415 (1941-05-01), Moulton
patent: 3034403 (1962-05-01), Neefe
patent: 3499862 (1970-03-01), Wichterle
patent: 3619044 (1971-11-01), Kamath
patent: 3628988 (1971-12-01), Stol et al.
patent: 3699089 (1972-10-01), Wichterle
patent: 3758448 (1973-09-01), Stamberger
Erickson Charles E.
Neogi Amar N.
Corbin John K.
Garrison David L.
Precision Cosmet Co., Inc.
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