Composite plastic lens and method of making the same

Details Composite plastic lens and method of making the same Composite plastic lens and method of making the same

1988-08-19

1990-01-09

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

156 99, 156153, 156629, 351159, 351166, 351169, 351172, 351176, 351177, G02C 702, G02C 706

Patent

active

048924032

ABSTRACT:
The composite plastic lens includes an anterior plastic lens having a first corrective feature and a posterior plastic lens having a second corrective feature. The anterior and posterior lenses are joined together by an adhesive that bonds opposing, etched surfaces of those lenses. The method of making the composite plastic lens includes, in one embodiment, the steps of etching the front and rear surfaces of the posterior and anterior lenses and bonding those etched surfaces together with an adhesive. Another method of making the composite plastic lens includes heating the lenses prior to bonding them together for a time such that the posterior and anterior lenses return to their original shape and curvature.

REFERENCES:
patent: 3588216 (1971-06-01), Bloom
patent: 3620888 (1971-11-01), Buzzell
patent: 3711417 (1973-01-01), Schuler
patent: 3877798 (1974-04-01), Tolar et al.
patent: 3940304 (1976-02-01), Schuler
patent: 4070105 (1978-01-01), Marzouk
patent: 4547049 (1985-10-01), Cotie
patent: 4645317 (1987-02-01), Frieder et al.
patent: 4679918 (1987-08-01), Ace
patent: 4690512 (1987-09-01), Forsyth

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