Method and apparatus for measuring distance between an eye and a

Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – For interpupillary distance measuring or lens positioning

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33200, A61B 310

Patent

active

060330716

ABSTRACT:
Methods for measuring the distance between an eye and a lens spaced apart from the eye include passing an elongated tubular structure between the eye and the lens, and causing a length of a wire member to pass out of the opening at a distal end of the elongated tubular structure. The length of the wire member extending out of the opening is selected so that the combination of the elongated tubular structure and the wire member extending out of the opening is located in close proximity to the eye and contacts the lens. This length of wire member extending out of the distal end is correlatable to the distance between the eye and the lens. Apparatus for providing such measurements are included.

REFERENCES:
patent: 563089 (1896-06-01), Strange
patent: 724963 (1903-04-01), Spaulding
patent: 758283 (1904-04-01), Shafer
patent: 1238045 (1917-08-01), Nelson
patent: 1488984 (1924-04-01), Heyne
patent: 2694262 (1954-11-01), Daniel
patent: 3995373 (1976-12-01), Brumbelow
patent: 4177571 (1979-12-01), Renier
patent: 5825459 (1998-10-01), Rubin

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