Ophthalmic device for measuring vertex distance and pantoscopic

Details Ophthalmic device for measuring vertex distance and pantoscopic Ophthalmic device for measuring vertex distance and pantoscopic

1978-05-22

1979-12-11

Martin, Jr., William D.

Geometrical instruments

Gauge

Spectacle

33143R, 33174D, A61B 310

Patent

active

041775716

ABSTRACT:
An ophthalmic measuring device for measuring vertex distance and pantoscopic tilt angle is disclosed. The device has a body and two arms which move slidably relative to each other to contact the eye and trial lens and a scale which measures the eye-lens distance. An implement for measuring the angle at which the spectacle temples are tilted relative to the frame front is also part of the device.

REFERENCES:
patent: 563089 (1896-06-01), Strange
patent: 724963 (1903-04-01), Spaulding
patent: 758283 (1904-04-01), Shaefer
patent: 1238045 (1917-08-01), Nelson
patent: 1488984 (1924-04-01), Heyne
patent: 2694262 (1954-11-01), Daniel
patent: 3995373 (1976-12-01), Brumbelow

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