方法：受检儿童3 211例使用目前我国通用的国际标准视力表检查视力。3岁及以上视力低于0.5，4～5岁低于0.6，6～7岁低于0.7或双眼视力相差两行以上者，通知到医院门诊复诊。

结果：受检儿童3 211例视力异常检出率为7.51%。视力异常眼的屈光状态以远视为主； 在屈光不正性弱视中，轻度弱视占比例最大，中度弱视次之，弱视患病率为6岁组3.68%，5岁组3.76%，4岁组7.93%，3岁组16.48%。各年龄组的视力随年龄增长而逐渐提高，各年龄组视力主要分布：3岁(0.5518±0.1910)、4岁(0.6444±0.1584)、5岁(0.6662±0.1544)、6岁(0.7601±0.1119)。视力异常率在3岁年龄组差异有统计学意义P<0.05，视力异常率在4～6岁年龄组差异无统计学意义，P>0.05。

结论：儿童的视力呈动态发育过程，对弱视的诊断应考虑年龄因素。应加大弱视常识及危害性的宣传，提高家长、社会对弱视的认识和重视。

METHODS: Children were asked to read the standard logarithmic visual acuity chart at the distance of 5m. Then, children under 3 years old whose visual degree were less than 0.5, the children of 4-5 years old whose visual degree were less than 0.6, the children of 6-7 years old whose visual degree were less than 0.7, or the visual gap was greater than 2 lines were asked to make a return visit at hospital outpatient.

RESULTS: The detection rate of vision disorders in 3 211 children was 7.51%. The refractive state of vision disorder was hyperopia; mild amblyopia accounted the largest percentage in the refractive amblyopia, followed by moderate amblyopia. The prevalence of amblyopia was 3.68% in 6-year-old group, 3.76% in 5-year-old group, 7.93 in 4-year-old group, 16.48% in 3-year-old group. As the growth of the age, the vision in each group also increased. The vision distribution in each group: 0.5518±0.1910 in 3-year-old group, 0.6444±0.1584 in 4-year-old group, 0.6662±0.1544 in 5-year-old group and 0.7601±0.1119 in 6-year-old group. The rate of vision disorders had statistical difference among the 3-year-old group(P<0.05), and no significant difference for the 4-6 years old group(P>0.05).

CONCLUSION: The development of children's vision is a dynamic process. Therefore, age factor should be taken into account in amblyopia diagnosis.