Method for making bifocal lens

Details Method for making bifocal lens Method for making bifocal lens

1985-10-23

1989-07-11

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

264 17, 264 18, 351159, 351164, 351168, 351172, B29C 3920

Patent

active

048469130

ABSTRACT:
Apparatus and a method of making an eyeglass lens module in which two lens components are disclosed. The first component is a conventional single vision stock lens having conventional corrections in the negative or positive diopter range. The second lens component is an overlay lens desirably formed from a plastic or glass and is as thin as practical. The overlays are in modules containing bifocals or trifocals or vocational modifications of a given diopter correction. The method of casting the overlaid lens includes aging a mixture of a plastic monomer and an inorganic peroxide catalyst prior to use. The two lens components are then optically and physically bonded together. Once the two lens components are secured to each other, they can then be fitted into a spectacle frame and delivered to the patient. When tinting is required, the plastic overlay can be readily tinted by conventional dye and methods.

REFERENCES:
patent: 2209587 (1940-07-01), Tillyer
patent: 3877798 (1975-04-01), Tolar et al.
patent: 4095772 (1978-06-01), Weber
patent: 4522993 (1985-06-01), Sasagawa et al.
patent: 4528351 (1985-07-01), Tarumi et al.
patent: 4547049 (1985-10-01), Cotie

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