Gonioscope

Details Gonioscope Gonioscope

1975-12-10

1977-07-05

Chatmon, Jr., Saxfield

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 1, 351 6, 351 15, 350 96R, A61B 310

Patent

active

040336794

ABSTRACT:
A gonioscope for viewing the angle of the trabeculum and the drainage angle and related structures comprising a lens having a cylindrical surface and formed at its front end with four inclined facets narrowing toward the front free end thereof. The lens includes a front surface substantially perpendicular to the longitudinal axis of the cylinder having therein a concave inwardly directed recess, the said facets constituting total internal reflection surfaces.

REFERENCES:
patent: 2430851 (1947-11-01), Allen
patent: 3413067 (1968-11-01), Froio
patent: 3452589 (1969-07-01), Hargen et al.
patent: 3589800 (1971-06-01), Cardona
patent: 3675984 (1972-07-01), Vulmiere
patent: 3820879 (1974-06-01), Frisen

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