G - Physics – 02 – C
Patent
G - Physics
02
C
G02C 7/04 (2006.01) A61L 27/02 (2006.01) A61L 27/10 (2006.01)
Patent
CA 2308256
The present invention provides antimicrobial ocular lenses made from a polymeric material that contains an inorganic antimicrobial agent in order to make the lens resistant to microbial growth in the body or on the surface of the lens. In one embodiment the inorganic antimicrobial agent is a zeolite which contains antimicrobial metal ions. Lenses of the invention prevent microbial contamination and growth thereon by incorporating the inorganic antimicrobial agent into the lens material. A lens of the invention does not leach the antimicrobial agent into the eye during use or into ophthalmic solution in which it may be stored, and is safe (non-toxic) for in vivo use. Furthermore, substantial antimicrobial properties are not imparted to the solution, nor are the characteristics of ophthalmic solutions altered. As a result, all types of ophthalmic solutions can be used safely with a contact lens of the invention. Another advantage of the antimicrobial agent of the invention is that it does not cause substantial discoloration of the lens over time. In another aspect, the invention provides a method of killing or reducing microbes on a contact lens made from a polymeric material by adding an antimicrobial-effective amount of an inorganic antimicrobial agent to the polymeric material.
Barry John E.
Trogolo Jeffrey A.
Healthshield Technologies L.l.c.
Sim & Mcburney
LandOfFree
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