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目的：通过测定正常婴幼儿模型视诱发电位的变化，探讨正常婴幼儿视功能的发育特点及发育成熟达正常成年人水平的年限。方法：随机选择正常婴儿１１５例，从出生后满３个月开始每隔３个月进行一次模型视诱发电位Ｐ１波潜伏期测量，直到１岁。之后每隔１年继续观察其中４８例模型视诱发电位的变化至３岁。同时还测定了３６例４－５岁正常幼儿模型视诱发电位。结果：３个月婴幼儿低、中空间频率（１°４０＇、２５＇方格）Ｐ１波潜伏期与６个月时相比差异有显著性意义（Ｐ＜０．０５），而６个月以后差别无显著性意义（Ｐ＞０．０５）；高空间频率（６＇方格）Ｐ１波潜伏期于１岁前各年龄组相比差异均有显著性意义（Ｐ＜０．０５）；低空间频率Ｐ１波潜伏期于６个月以后，中空间频率于４岁，高空间频率于５岁时与成人相比均数差别均无显著性意义（Ｐ＞０．０５）。结论：视觉系统的发育具有一定的阶段性和规律性。低空间频率Ｐ１波潜伏期于１岁前、中空间频率于４岁、高空间频率于５岁时达成人水平。
OBJECTIVE: To investigate the developmental features of visual function in normal infants and the age of maturation to reach the level of normal adults by measuring the changes of visual evoked potentials in normal infants and young children. Methods: One hundred and fifteen normal infants were randomly selected. The latency of P1 evoked potential was measured every 3 months from the third month after birth to 1 year old. After every one year, 48 cases of model continue to observe the change of visual evoked potentials to 3 years old. Also measured in 36 cases of 4-5 years old normal child model of evoked potential. Results: The latency of P1 wave in low and medium spatial frequencies (1 ° 40 ’, 25’ squares) in infants at 3 months was significantly different from that at 6 months (P <0.05) There was no significant difference between the two groups (P> 0.05). The latency of P1 wave in high spatial frequency (6 ’square) was significantly different in all age groups before the age of 1 (P <0.05) Spatial frequency P1 wave latency in 6 months later, the spatial frequency at 4 years of age, high spatial frequency at 5 years of age compared with the average number was no significant difference (P> 0.05). Conclusion: The development of the visual system has a certain stage and regularity. Low-spatial-frequency P1 wave latency was 1 year old, with a mid-spatial frequency of 4 years and a high spatial frequency of 5 years of age.