[Increase in the amplitude of the b-wave of the cone electroretinogram during light adaptation].
BACKGROUND
In experimental and in clinical electrophysiology, cone electroretinograms (ERG) undergo typical changes of the b-wave during the course of light adaptation.


RESULTS
B-Waves obtained from twenty healthy subjects, exposed to a rod-desensitizing adapting field for ten minutes show an increase of amplitude. This increase was observed using a short wavelength as well as with a long wavelength stimulus. The cone ERG implicit times decrease slightly during light adaptation.


CONCLUSIONS
To avoid considerable variation in clinical cone-ERG it is necessary to wait a certain period of time before measuring cone b-waves and comparing them with normative values. Possible mechanisms underlying these adaption-induced ERG changes are discussed.
Knobel
U
U
Elektroretinografie Laboratorium, Augenklinik Universitätsspital, Zürich, Schweiz.
Niemeyer
G
G
D000221:Adaptation, Ocular / Q000502:physiology*; D000328:Adult; D004596:Electroretinography; D005260:Female; D006801:Humans; D008297:Male; D012016:Reference Values; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*
Amplitudenzunahme der b-Welle des Zapfen-Elektroretinogramms während Helladaptation.