Contact lens having at least one aspherical, progressive multifo

Details Contact lens having at least one aspherical, progressive multifo Contact lens having at least one aspherical, progressive multifo

1985-11-19

1989-08-29

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351160R, G02C 704

Patent

active

048611522

ABSTRACT:
The invention concerns an aspherical multifocal contact lens comprising at least one optical zone for the vision for near and at least one optical zone for the vision for far, without intermediary line and without transition between said zones, said aspherical face being foreseen to define a central optical zone with a predetermined great aberration, on a predetermined size, said great aberration of said central optical zone being said greatest of said lens. This contact lens provides a better quality of correction and a better clearness of image and can be used as an intra-ocular implant to be substituted for the eye crystalline lens.

REFERENCES:
patent: Re25286 (1962-11-01), DeCarle
patent: 4401372 (1983-08-01), Mancini et al.
patent: 4418991 (1983-12-01), Breger
patent: 4508436 (1985-04-01), Sitterle
patent: 4580882 (1986-04-01), Nuchman et al.
patent: 4636049 (1987-01-01), Blaker

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