Method of making eyeglass lenses with add on segments

Details Method of making eyeglass lenses with add on segments Method of making eyeglass lenses with add on segments

1998-01-27

1999-08-17

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156245, 1562737, 1562755, 1563071, 351159, 351166, B32B 3124, G02C 702

Patent

active

059388765

ABSTRACT:
In order to enable ophthalmic (eyeglass) lenses with add-on lens segments to be produced economically so as, for example, to provide a multi-focal addition to a base single lens and dispensed to a user, the add on segment is molded from a liquid photpolimer and partially cured to a state where it is elastomeric (a gel which holds its shape). The segment is then located upon a surface of the base lens which acts as a substrate where the base lens which acts as a substrate and conforms to the surface even if the surface has special corrective curvature as for astigmatism. The base lens may be a conventional plastic lens (acrylic or polycarbonate). No additional adhesive is required. When in place the curing of the segment is completed so that the multi-focal lens with the segment adhering to the base lens is produced.

REFERENCES:
patent: 4859261 (1989-08-01), Ace
patent: 4975328 (1990-12-01), Hirose et al.
patent: 5508205 (1996-04-01), Dominguez et al.
patent: 5531940 (1996-07-01), Gupta et al.

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