Pulfrich's phenomenon and drusen of optic nerve head.
The comportment of placing a swinging pendulum (Pulfrich's phenomenon) in front of three cases of optic nerve head drusen has shown that reduced conductivity is a fact in the optic nerve harboring the drusen, giving oval circular movement. A suggestion is made to use this simple test in patients with this disease.
D000293:Adolescent; D000328:Adult; D005260:Female; D005451:Fluorescein Angiography; D005654:Fundus Oculi; D006801:Humans; D009898:Optic Disk / Q000503:physiopathology; D009901:Optic Nerve Diseases / Q000175:diagnosis* / Q000503:physiopathology; D014787:Vision Tests / Q000379:methods