Back vision eyeglasses

Details Back vision eyeglasses Back vision eyeglasses

1995-11-09

1997-06-10

Mai, Huy

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With rear-view reflectors

G02C 714

Patent

active

056381441

ABSTRACT:
Back vision eyeglasses comprising a frame worn on a face in front of eyes of a person. A pair of regular lenses are held stationary in the frame. A pair of rearwardly facing adjustable mirror lenses are mounted on one side of the frame. Most of an ordinary field of vision seen through the regular lenses is not obstructed and interfered with by the adjustable mirror lenses. The adjustable mirror lenses are instantly available for use by the person directing a line of vision from the eyes slightly to either side to see reflected images coming from behind.

REFERENCES:
patent: 1272833 (1918-07-01), Metcalf
patent: 1359576 (1920-11-01), Colman
patent: 3617115 (1971-11-01), Pratt
patent: 3998058 (1976-12-01), Chaney et al.
patent: 4349246 (1982-09-01), Binner
patent: 5005964 (1991-04-01), Berke et al.
patent: 5044741 (1991-09-01), De Giacomi

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