屈光不正者的视差诱发电位检测

目的 应用视差诱发电位检查探讨屈光不正对立体视功能的影响及其机制。方法 用新型静态随机点立体图深度翻转作视刺激，对21名屈光不正者（屈光度>±0.75D，≤±8.00D）和40名正常人进行视差诱发电位检测。 结果 在不同视差刺激时屈光不正者与正常人一样均可记录到与立体刺激相关的宽大正波（即P₂₅₀波）；随视差的增大P₂₅₀波形和振幅发生相应的变化，变化的特征与正常人相类似；近视与远视者的视差诱发电位P₂₅₀波振幅和潜伏时无明显差别。 结论 在一定屈光范围内的屈光不正经完全矫正后对立体视功能没有明显的影响。 (中华眼底病杂志,1998,14:225-227)

The detection of disparity evoked potentials in ametropes.

Purpose To investigate the influence of ametropia on stereopsis and its mechanism by using the disparity evoked potential testing. Methods A new set of static random dot stereograms was utilized as a stimulation to elicit the disparity evoked potentials in 21 ametropes and 40 stereo normal subjects. Rezults The P₂₅₀ wave,which was related to stereoscopic stimulation in ametropes,was recorded in both the ametropes and emetropic stereo normal persons in this series,and the characteristic changes of P₂₅₀ wave with increasing visual disparity in ametropes were similar to those in normal subjects.The differences of mean amplitudes and latencies of P₂₅₀ waves between myopes and hyperopes were not significant. Conclusion Ametropia in full correction dose not significanly affect the function of stereopsis. (Chin J Ocul Fundus Dis,1998,14:225-227)