Extraocular contact lens construction

Details Extraocular contact lens construction Extraocular contact lens construction

A - Human Necessities

61

F

88/40

A61F 2/14 (2006.01)

Patent

CA 1197717

ABSTRACT OF THE DISCLOSURE The invention contemplates improved extraocular-lens structures for contact with the cornea of a human eye, to be worn in place of spectacles. The construction features a lens element of requisite prescription power but of diameter which substantially equals or only slightly exceeds the fully dilated pupil side of the wearer, and fenostrated haptic structure peripherally engaged to the lens. The haptic structure extends radially outwardly and is so thin and axially compliant as to be self-conforming to the curvature of the cornea and to effectively adhere thereto, thus stabilizing the lens for retention of its position on the optical axis of the eye. The haptic structure is formed by two sheets of transparent material laminated to opposite sides of the lens and to each other. The effective surface of the haptic area is reduced by photographically delineated milling to fenestrate the haptic structure radially outwards of the lens.

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