Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Composite or multiple layer
Patent
1993-12-20
1995-10-17
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Composite or multiple layer
264 24, 264 27, 264 28, 425808, B29D 1100
Patent
active
054588197
ABSTRACT:
A composite device which may be implanted in the cornea of the human eye to replace damaged or diseased portions, and a method of manufacturing the said device, are disclosed. The device consists of a transparent central portion intimately attached to an opaque spongy rim. Both portions are made of hydrogel materials produced in different conditions of polymerization during a two-stage process performed in a specific moulding unit. The spongy rim promotes and maintains cellular invasion from the host corneal tissue, thus providing a tight union between implant and recipient cornea which prevents the postoperative extrusion of the implant.
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Chirila Traian V.
Constable Ian J.
Crawford Geoffrey J.
Russo Albert V.
Dreger Walter H.
Lions Eye Institute of Western Australia, Incorporated
Vargot Mathieu D.
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