Studies on skin-electrode ERG in the closed-eye state.
Electroretinograms (ERG) were recorded using contact lens electrode and periorbital skin electrode in the opened- and closed-eye states in 15 volunteers. The implicit times of a-wave and b-wave were almost equal between recordings by contact lens electrode and those by skin electrode, when the tested eye was opened. Implicit times were prolonged when tested in the closed-eye state. In the opened-eye state, the b-wave amplitude by skin electrode was decreased to an extent of about 40%, compared to that by contact lens electrode. If repetitional stimuli of higher intensities were employed and responses were averaged, clinically satisfactory ERGs were recordable with skin electrodes in the closed-eye state.
D000328:Adult; D002648:Child; D002675:Child, Preschool; D004566:Electrodes; D004596:Electroretinography / Q000295:instrumentation / Q000379:methods*; D005143:Eyelids; D006801:Humans; D007223:Infant; D010775:Photic Stimulation; D012164:Retinal Diseases / Q000175:diagnosis*; D012867:Skin