Device for measuring the Pulfrich stereo-illusion phenomenon and

Details Device for measuring the Pulfrich stereo-illusion phenomenon and Device for measuring the Pulfrich stereo-illusion phenomenon and

1990-09-14

1992-03-31

Hindenburg, Max

Surgery

Truss

Pad

600 27, 351201, A61B 1300

Patent

active

050998587

ABSTRACT:
A device useful in diagnosing ocular and optic nerve diseases in people who are capable of experiencing the Pulfrich stereo-illusion phenomenon which comprises an enclosure having two eye pieces, a bob and a reference point for the bob within said bob is positioned below the top of the reference point but slightly in front of it when the patient to be tested is standing in front of the device, illumination means in front of the bob and reference point, reflective means for viewing the bob and reference point through the eye pieces, means for varying the amount of light perceived through the eye pieces by each of the eyes individually of the patient to be tested, means for varying the amount of illumination and means for causing the bob to arc in a pendulum movement in front of the reference point.

REFERENCES:
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patent: 3623799 (1971-11-01), Millodot
patent: 4131342 (1978-12-01), Dudley
patent: 4564274 (1986-01-01), Clark
Hofeldt--Clinical Applications of the Pulfrich Phenomenon, Ocular Inflammation Ther. 1:117-123, Jun. 1983.
Tredici et al.--The Pulfrich Effect in Ansiometropic Amblyopia and Strabismus, American Journal of Ophthalmology, 98:499-503, Oct. 1984.
Hofeldt et al.--Pulfrich Stereo-Illusion Phenomenon in Serous Sensory Retinal Detachment of the Macula, American Journal of Ophthalmology 100:576-580, Oct. 1985.

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