Corneal contact lens and method for making the same

Details Corneal contact lens and method for making the same Corneal contact lens and method for making the same

G - Physics

02

C

88/40

G02C 7/04 (2006.01)

Patent

CA 1044054

ABSTRACT An improved transparent corneal contact lens and method of making the same is disclosed. The lens has an outer edge portion of about 0.7mm effective radius and a thickness of between about 0.003 to about 0.004 inches. The apex of the outer edge is positioned to be at or below the center line between the posterior and anterior surfaces of the outer edge portion to enable lacrimal fluid to flow between the lens and the corneal surface as well as substan- tially reduce the possibility of collision by the upper lid during closing. The method involves slowly heating, maintaining and cooling the lens and thereafter cutting the lens within a specified time after it has reached ambient temperature, which enables the lens to be more thinly cut.

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