Universal vision corrector

Details Universal vision corrector Universal vision corrector

1989-03-06

1990-09-25

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With antiglare or shading

G02C 716

Patent

active

049589229

ABSTRACT:
A universal vision corrector particularly applicable to myopia, hypermetropia,astigmatism and presbyopia comprises, in front of the eye, an opaque zone (2) surrounding a small central area (3) situated in the vision axis, said small central transparent area (3) forming diaphragm and creating a reduced retinal giving a net vision. The opaque zone (2) is continuous, has a minimum average diameter of 3 mm and a maximum average diameter of 8 mm to preserve the peripheral vision and the central transparent area (3) has the surface comprised between 0.2 and 3.5 mm.sup.2, and preferably between 0.5 and 1 mm.sup.2.

REFERENCES:
patent: 459563 (1891-09-01), Groh
patent: 2856813 (1958-10-01), Kudelko
patent: 3507566 (1970-04-01), Knapp
patent: 4249803 (1981-02-01), Byler

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