Pupillary distance measuring instrument

Details Pupillary distance measuring instrument Pupillary distance measuring instrument

1983-10-03

1985-05-07

Haroian, Harry N.

Geometrical instruments

Gauge

Spectacle

33512, A61B 310

Patent

active

045149062

ABSTRACT:
An instrument for measuring the distance of the eye from the root of the nose, of the type comprising a sight window for reading the indication of the measured value, a part for resting on the nose and at least one slider provided with a measuring mark, consists of a handle part provided with the sight window and spaced from the part for resting on the nose, and of an adjusting part containing the single slider.

REFERENCES:
patent: 557220 (1896-03-01), Palmer
patent: 716516 (1902-12-01), Boothroyd et al.

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