Electroretinograms Using Skin Electrodes.

Kang, Dae Uck; Kim, Si Yeal

Original Article

Journal of the Korean Ophthalmological Society 1989;30(1):73-78.
Published online January 1, 1989.

Electroretinograms Using Skin Electrodes.

Dae Uck Kang, Si Yeal Kim

Department of Ophthalmology, School of Medicine, Kyungpook National University, Taegu, Korea.

피부전극을 이용한 망막전위도

강대욱(Dae Uck Kang),김시열(Si Yeol Kim)

Abstract

The clincal importance of electroretinogram(ERG) lies in the diagnosis of suspected retinal dysfunction. The noncorneal ERG is essential for certain patients in which corneal recording is difficult such as children and uncooperators. ERGs were recorded using contact lens electrode and skin electrode in 31 volunteers. The results obtained were as follows: The b-wave amplitude with skin electrode was 28.4% compared to that with contact lens electrode. The best recording with skin electrode was made from skin point on the middle third of lower lid. When the eyeball was adducted or abdu cted, the maximum amplitude of b-wave with skin electrode was obtained from the canthus near the central cornea. When the stimulus intensity was elevated from 0.3 Joule to 60 Joules, the maximum amplitude with contact lens electrode was recorded with 20 Joules stimulation, but that with skin electrode was recorded with 60 Joules stimulation.

Key Words: ERG;skin electrode;contact lens electrode