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著者于1981～1985年对某小学92名学生进行了视力动态观察。检查视力时采用对数视力表,5分记录法。调查结果表明:视力不良率以一年级和四年级时为高,分别为18.48%和14.13%,二、三、五年级视力不良率分别为4.35%、7.61%、8.70%。著者对视力不良变化的原因进行了分析认为:小学一年级学生的视力不良为生理性远视造成的结果。以后随着年级的升高而视力不良率逐渐增加,这是由于学习负担逐渐加重,用眼视近工作时间逐渐延
Authors from 1981 to 1985 92 primary school students in a dynamic visual acuity. Visual acuity when using logarithmic visual acuity chart, 5 minutes recording method. The results showed that the rate of poor eyesight was higher in first grade and fourth grade, which were respectively 18.48% and 14.13%. The second, third and fifth grade were 4.35%, 7.61% and 8.70% respectively. The author of the reasons for poor eyesight changes were analyzed that: poor eyesight of primary freshmen is the result of physiological hyperopia. Later, with the increase of grade, the rate of poor eyesight gradually increased, which is due to the gradual increase of learning burden, gradually reduced with the length of time