Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1988-10-05
1991-01-29
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351168, 351231, A61B 302, A61B 304, G02C 706
Patent
active
049881850
ABSTRACT:
A method for prescribing bifocal spectacles for a person having reduced visual acuity includes placing a trial frame on the face of said person in front of his eyes and measuring a far interpupillary distance when said person is viewing a distant object, placing corrective lenses in said frame until said person views said distant object with acuity, placing high plus lenses in said frame for each eye and moving said right and left trial frame sections towards each other while said person is viewing text at a nearer distance and until said person can read said text with binocular vision and then obtaining a near interpupillary distance from said frame and recording said far and near distances with said far prescription and said high plus diopter to employ said recorded data to fabricate bifocal spectacles for said person from said data. The resulting spectacles are also described.
REFERENCES:
patent: 980070 (1910-12-01), Cowan
patent: 1002580 (1911-09-01), Griffin
patent: 4407571 (1983-10-01), Augusto et al.
patent: 4461550 (1984-07-01), Legendre
Bovernick Rodney B.
Designs for Vision Inc.
Plevy Arthur L.
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