Ophthalmic lenses

Details Ophthalmic lenses Ophthalmic lenses

1985-02-20

1986-06-03

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 706

Patent

active

045926301

ABSTRACT:
An ophthalmic lens having a far vision viewing zone in the upper region of the lens, a near vision viewing zone in the lower region of the lens, an intermediate vision viewing zone in the region intermediate the far vision zone and the near vision zone and a principal meridian vertically disposed in the center of the lens is provided. The far vision viewing zone is divided horizontally into three regions wherein astigmatism is at least in the central region and increases in the regions on both sides of the center region. The central region is formed so that the principal meridian substantially bisects the central region of the far vision viewing zone.

REFERENCES:
patent: 4315673 (1982-02-01), Guilino et al.

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