| 摘要 |
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.
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