A 3-year follow-up study of ocular hypertension by pattern electroretinogram.
A 3-year following-up study of the pattern electroretinogram (PERG) was performed in 15 eyes of 8 ocular hypertensive (OHT) patients. At first PERG recording, the amplitude of the first positive wave P1 was statistically significantly reduced in the OHT patients compared with age-matched controls (p < 0.05). There was no difference in the amplitude of the second negative wave N2 (p > 0.05). At 40 months, the amplitude of both P1 and N2 decreased and the latency of P1 was elongated. Among the changes, the decrease in N2 amplitude was the most drastic (p = 0.0001 compared with the control, p < 0.05, compared with the first recording). Glaucomatous visual field defects developed 5 years after the first PERG recording and 2 years after the reduction in N2 amplitude in 1 patient. Decreased N2 amplitude of the PERG may be an important warning sign predicting the development of glaucoma in OHT patients.
Arai
M
M
Department of Ophthalmology, Faculty of Medicine, Kyoto University, Japan.
Yoshimura
N
N
Sakaue
H
H
Chihara
E
E
Honda
Y
Y
D000328:Adult; D000368:Aged; D004596:Electroretinography; D005260:Female; D005500:Follow-Up Studies; D005901:Glaucoma / Q000503:physiopathology; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000503:physiopathology*; D010364:Pattern Recognition, Visual / Q000502:physiology; D012165:Retinal Ganglion Cells / Q000502:physiology; D058609:Visual Field Tests; D014794:Visual Fields