[Repeat flash static perimetry according to Enoch: a simple technique for evaluating neuro-ophthalmological patients (author's transl)].
A static perimetry technique is described, which was first introduced by Enoch. The test-target is flashing and the increment threshold is recorded continuously for five minutes. In this way, using a commercially available Goldmann perimeter, it is possible to find a time-dependent decrease in sensitivity in patients with lesions of the optic pathways. No significant loss in sensitivity is found in patients with pre-disc pathologies, who show visual field deficits. This drop in sensitivity is at least of one log unit. The phenomenon is considered to be a "fatigue" in transmission of visual information and is presumably due to lesions in the conduction system (myelin). The test, which is easily performable, can be used follow-up the lesion: when this resolves, the decrease in sensitivity also disappears. Two patients with retro-bulbar neuritis with the typical characteristics of the above mention phenomenon are presented.
D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009431:Neural Conduction; D009901:Optic Nerve Diseases / Q000175:diagnosis*; D020221:Optic Nerve Injuries; D009902:Optic Neuritis / Q000175:diagnosis / Q000503:physiopathology; D013997:Time Factors; D058609:Visual Field Tests / Q000379:methods*
Périmétrie statique avec flashes répétés dans le temps selon Enoch: une méthode simple pour l'examen, l'évaluation de patients neuro-ophtalmologique.