Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1983-10-20
1985-04-30
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
G02C 706
Patent
active
045140618
ABSTRACT:
An ophthalmic lens for the correction of presbyopia having a progressive power surface generated by the line of intersection of an ordered sequence of intersecting spheres and cylinder surfaces, the cylinder surfaces being so chosen as to produce a uniform distribution of aberration and optical power for gently curving smooth optical effect.
REFERENCES:
patent: 1448052 (1923-03-01), Brilhart
patent: 3785724 (1974-01-01), Cretin-Maitenaz
patent: 4274717 (1981-06-01), Davenport
patent: 4315673 (1982-02-01), Guilino et al.
American Optical Corporation
Corbin John K.
Sugarman Scott J.
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