Multifocal lens

Details Multifocal lens Multifocal lens

1989-07-18

1990-09-11

Arnold, Bruce Y.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351172, G02C 706

Patent

active

049557122

ABSTRACT:
A multifocal lens is described with a main lens designed for distance vision and a segment designed for near vision.
The lens in accordance with the present invention is characterized by the fact that one surface of the segment consists of the progression area and the reading portion of a progressive surface.
In an advantageous further development the progressive surface whose progression area and reading portion form one surface of the segment is designed in such a way that its surface astigmatism is concentrated essentially in the distance portion.

REFERENCES:
patent: 4315673 (1982-02-01), Guilino et al.
patent: 4461550 (1984-07-01), Legendre
patent: 4592630 (1986-06-01), Okazaki

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