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APPLICATION OF TWIN FLASH STIMULI FOR SOME MACULAR DISEASES ISOLATION OF LOCAL RESPONSES BY TWIN FLASHES
Author(s) -
MITSUYU MARIKO,
HONDA YOSHIHITO,
NEGI AKIRA
Publication year - 1980
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1980.tb06681.x
Subject(s) - abnormality , medicine , ophthalmology , electroretinography , optic nerve , erg , stimulus (psychology) , flash (photography) , functional impairment , audiology , retinal , optics , psychology , physics , psychiatry , psychotherapist
Double flash ERG was examined for patients with visual loss from macular and optic nerve disorders, and the responses were compared. K values (= (B 1 ‐B 2 ))/B 1 × 100) of the former were larger than normal values when the stimulus intervals were between 200 and 500 mseconds, and abnormality of K values seemed to correspond to the functional impairment of macula. On the other hand, K values of the patients with optic nerve diseases remained in the normal range. These facts indicate that double flash ERG is a very useful method to estimate the cone function clinically, and can be employed as a routine examination for patients with suspected cone dysfunction.