Yanjie Tian1, Yuexin Wang1, Jiahui Ma1, Xuemin Li2. 1. Department of Ophthalmology, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China. 2. Department of Ophthalmology, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, China. 13911254862@163.com.
Abstract
PURPOSE: To compare the electrophysiology between mild thyroid-associated ophthalmopathy (TAO) patients and normal population. METHODS: The present research was a retrospective observational study and enrolled consecutive patients diagnosed with mild TAO according to European Group on Graves's Orbitopathy with corrected to normal vision. Full-field electroretinography, pattern visual evoked potential (PVEP) and isolated-check visual evoked potential (icVEP) were performed for TAO patients and age-matched normal subjects. RESULTS: Thirty-two eyes with mild TAO and forty-six eyes from normal subjects were included. Statistically significant increase in the amplitude of dark-adapted 0.01, 3 and 10 ERG and total oscillatory potentials and light-adapted 3 and 30 Hz flicker ERG were observed in TAO patients compared with the normal subjects, but not the latency. No significant difference was observed in the P100 amplitude or latency in 1° and 15' PVEP between TAO patients and normal subjects. The signal-to-noise ratio (SNR) was not significantly different in TAO patients at the contrast of 1%, 2%, 8%, 16% or 32% icVEP, and the SNR in contrast 4% icVEP was significantly smaller in TAO patients compared to normal subjects. CONCLUSION: Mild TAO patients can have electrophysiological changes that might indicate neural changes in the early disease phase.
PURPOSE: To compare the electrophysiology between mild thyroid-associated ophthalmopathy (TAO) patients and normal population. METHODS: The present research was a retrospective observational study and enrolled consecutive patients diagnosed with mild TAO according to European Group on Graves's Orbitopathy with corrected to normal vision. Full-field electroretinography, pattern visual evoked potential (PVEP) and isolated-check visual evoked potential (icVEP) were performed for TAO patients and age-matched normal subjects. RESULTS: Thirty-two eyes with mild TAO and forty-six eyes from normal subjects were included. Statistically significant increase in the amplitude of dark-adapted 0.01, 3 and 10 ERG and total oscillatory potentials and light-adapted 3 and 30 Hz flicker ERG were observed in TAO patients compared with the normal subjects, but not the latency. No significant difference was observed in the P100 amplitude or latency in 1° and 15' PVEP between TAO patients and normal subjects. The signal-to-noise ratio (SNR) was not significantly different in TAO patients at the contrast of 1%, 2%, 8%, 16% or 32% icVEP, and the SNR in contrast 4% icVEP was significantly smaller in TAO patients compared to normal subjects. CONCLUSION: Mild TAO patients can have electrophysiological changes that might indicate neural changes in the early disease phase.
Authors: Bryce A Ford; Paul H Artes; Terry A McCormick; Marcelo T Nicolela; Raymond P LeBlanc; Balwantray C Chauhan Journal: Ophthalmology Date: 2003-06 Impact factor: 12.079