Progressive multifocal ophthalmic lens

Details Progressive multifocal ophthalmic lens Progressive multifocal ophthalmic lens

1995-07-14

1998-02-17

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 706

Patent

active

057196583

ABSTRACT:
In a progressive multifocal ophthalmic lens providing excellent performance in the far vision region, good width of the near vision region and gentle progression in the intermediate vision region therebetween, the far vision region comprises an angular sector defined by two half-lines that intersect at the geometrical center of the lens forming an upwardly-directed angular segment with an included angle of preferably more than 145.degree. in which all points have a cylinder less than A/2 diopters, and constraints are applied governing the gentleness of progression in the intermediate vision region and the relative width of the near vision region.

REFERENCES:
patent: 5488442 (1996-01-01), Harsigny et al.

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