Surface-treated contact lens and method of producing

Details Surface-treated contact lens and method of producing Surface-treated contact lens and method of producing

1985-08-14

1987-05-19

Lowe, James

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

264 14, 264 17, 264 18, 264 26, B29D 1100

Patent

active

046662499

ABSTRACT:
A contact lens for correction of astigmatism is formed from a single polymeric or copolymeric material. The lens has a central optical zone of greater rigidity than a surrounding non-optical zone. The rigidity of the central optical zone is sufficient for it to retain an astigmatism-correcting shape when worn on an eye, while the surrounding non-optical zone conforms to the shape of the eye.

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