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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。
Objective To investigate the effect and mechanism of anisometropia on stereopsis using parallax evoked potentials. Methods A total of 21 ametropic patients (diopter> ± 0.75D, ≤ ± 8.00D) and 40 normal subjects were tested for parallax evoked potentials by using the new static random point stereoscopic image depth inversion. Results In different parallaxes, refractive errors were recorded as large positive waves (ie P250 waves) as those of normal subjects. P250 waveforms and amplitudes changed correspondingly with the increase of parallax. Normal people are similar; myopia and hyperopia parallax evoked potential P250 wave amplitude and latency was no significant difference. Conclusion There is no obvious effect on stereopsis after complete correction of refractive errors within a certain refractive range.