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The influence of argon laser panretinal photocoagulation on the rabbit ERG c‐wave
Author(s) -
Chuang HueiChun,
Kawano Shinichiro,
Arai Mikki,
Tsukada Takako,
Kita Mihori,
Negi Akira,
Honda Yoshihito
Publication year - 1992
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.1755-3768.1992.tb08568.x
Subject(s) - panretinal photocoagulation , erg , ophthalmology , medicine , laser coagulation , rabbit (cipher) , retina , retinal , electroretinography , diabetic retinopathy , optics , visual acuity , physics , endocrinology , diabetes mellitus , mathematics , statistics
. We observed the influence of panretinal photocoagulation on the ERG c‐wave in rabbit eyes. DC‐registered ERGs were recorded from rabbit eyes before and after photocoagulation, and compared with those of the fellow eyes. The rabbits were subdivided into 3 groups according to application numbers: 500, 1000, and 1500 spots. The ERG c‐waves were found to have totally disappeared in all rabbits 3 days after panretinal photo‐coagulation, then reappeared with various intervals. In the 500 spot group, the c‐wave reappeared after one week, and almost reached control levels in one and a half months. In the 1000 spot group, a 10 day delay was noted, and 90% of control levels were regained after 6 months. In the 1500 spot group, the c‐wave didn't reappear until 2 weeks later, and regained 70% (of the control level) after 6 months. The recovery rates were related to the number of laser applications. These results indicate that the ultimate degree of recovery in c‐wave amplitude and the time required for the reestablishment of retinal pigment epithelium function both depend on the size of the coagulated area.