Device for checking the phoria of an individual under conditions

Details Device for checking the phoria of an individual under conditions Device for checking the phoria of an individual under conditions

1980-08-22

1983-10-25

Rosenberger, R. A.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

For fusion and space perception testing

351222, A61B 302

Patent

active

044115016

ABSTRACT:
This device is associated with spectacles 35 which are intended to be worn by the individual in question and which are equipped with crossed analyzers 36, 37.
It comprises a ruler 10, which carries a scale 11 and can be seen in polarized light corresponding to the analyzer 36, and a ruler 12, which carries a reference mark 13 and can be seen in polarized light corresponding to the analyzer 37, the ruler 12 being mounted so that it can move under control of an operating knob 24, for superposition of the reference mark 13 on a determined division of the scale 11, the corresponding displacement of the ruler 12 being assessed by means of a checking scale 28.
Application to the checking of the phoria of an individual under conditions of close vision.

REFERENCES:
patent: 2238207 (1941-04-01), Ames et al.
patent: 2676588 (1954-04-01), Shamsky
patent: 3822932 (1974-07-01), Humphrey

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