Marked contact lens bearing optical marking element

Details Marked contact lens bearing optical marking element Marked contact lens bearing optical marking element

1997-12-22

1999-08-10

Manuel, George

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 704

Patent

active

059367040

ABSTRACT:
The marked contact lens has at least one microlens optical marking element integrally formed on the surface of the contact lens in a peripheral area thereof. The microlens marking elements are of shallow depth, yet focus light to appear as relatively bright (or dark) marking objects. The marking elements may be spherical or cylindrical microlens formations. The dimensions of the microlenses are chosen so as to avoid any irritation when worn by the user. The marking objects identify the lens source, proper orientation or, in the case of soft lenses, inversion.

REFERENCES:
patent: 4194814 (1980-03-01), Fischer et al.
patent: 4525044 (1985-06-01), Bauman
patent: 5062701 (1991-11-01), Drazba et al.
patent: 5467149 (1995-11-01), Morrison et al.
patent: 5641437 (1997-06-01), Williams et al.

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