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利用同视机分视双眼 ,用计算机产生 5种黑 -白棋盘格翻转刺激 ,依次记录 30例单眼弱视患者的稳态视觉诱发电位 (VEP)。通过健眼在双、单眼状态下的能量之比 (B/ M)来评价双眼相互作用 (BI)。结果单眼弱视者当双眼棋盘格大小 (CS)相同时 B/ M最小 ,但较正常人明显增大。认为单眼弱视者 BI明显减小 ,在眼间竞争最显著的条件下 (即双眼 CS相同时 )亦仅表现微弱的相互作用 ,其处理空间信息的能力减弱。弱视患者的双眼神经元基本消失 ,视皮层神经冲动主要来自健眼 ,其视觉传入系统存在结构上的异常。双眼分视下 CS为 15～ 12 0 min,特别是 30 min时可作为单眼弱视患者 VEP检查的理想刺激条件。
The eyes were divided into two groups by using the same-looking machine. Five types of black-and-white checkerboards were generated by the computer. The steady-state visual evoked potentials (VEPs) were recorded in 30 patients with monocular amblyopia. Binocular interaction (BI) was evaluated by the ratio of energetic ratio (B / M) of the healthy eye to both eyes and monocular state. Results Monocular amblyopia B / M was the smallest when the checkerboard size (CS) was the same in both eyes, but was significantly higher than that in normal subjects. We think monocular amblyopia significantly reduced the BI, in the most competing eye conditions (that is, the same binocular CS) also showed only weak interaction, its ability to deal with spatial information weakened. Amblyopic patients binocular neurons disappeared, the main visual cortex nerve impingement from the eye, the visual system of the existence of structural abnormalities. Eyes under the eyes of CS for 15 ~ 120 min, especially 30 min can be used as monocular amblyopia VEP examination ideal stimulus.