Relationship between visual field defect and multifocal electroretinogram.
We investigated the effect of artificial parafoveal scotomata on the multifocal electroretinogram (M-ERG). M-ERGs were recorded from normal subjects using a monitor with several different sizes of black paper attached. A lower response density area around the 10 to 15 degree parafoveal region was not recognized for scotomata up to 3 degrees but was observed in scotomata above 5 degrees (visual angle) in the field topography of M-ERG. The shape of the scotomata was not circular but somewhat oval. The results from two cases of parafoveal retinal degeneration accorded well with this basic study.
Yoshii
M
M
Department of Ophthalmology, National Defense Medical College, Tokorozawa, Japan.
Yanashima
K
K
Matsuno
K
K
Wakaguri
T
T
Kikuchi
Y
Y
Okisaka
S
S
D000328:Adult; D004596:Electroretinography / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010775:Photic Stimulation; D012162:Retinal Degeneration / Q000150:complications*; D012607:Scotoma / Q000150:complications*; D014786:Vision Disorders / Q000175:diagnosis* / Q000209:etiology; D014792:Visual Acuity; D058609:Visual Field Tests; D014794:Visual Fields