04929075 is referenced by 18 patents and cites 2 patents.

The invention relates to an optical, spectacle-type device for aiding the sight of persons who have serious vision deficiencies. The novel device makes it possible for such persons to focus at close-up, as well as at remote objects. The device comprises a spectacle frame (carrier-frame), provided with either neutral or optical lenses, in front of which (or attached to which) there is provided one or two telescopic lens-systems, there being provided a frame bearing a corrective lens or pair of lenses which can be moved so as to be in front of said telescopic lenses or removed from such position, said additional lenses changing the focal length of the entire system.

Title
Optical viewing system
Application Number
63314
Publication Number
4929075
Application Date
July 31, 1989
Publication Date
May 29, 1990
Inventor
Isaac Eliakim
23 Omri Street, Tel-Aviv
IL
Agent
Fleit Jacobson Cohn Price Holman & Stern
IPC
G02B 25/00
G02C 1/00
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