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目的 :观察并评价调节滞后与儿童近视关系 ,探讨儿童近视发病机理。方法 :使用分光镜动态检影法测定 38名年龄 6～ 14岁在学儿童 (平均年龄 10 .1岁 )的张力性调节值与调节滞后值。其中 19名为正视 ,19名为近视。通过注视昏暗照明下置于眼前 40厘米的DOG视标 (0 .2cpd)打开调节环 ,于持续聚焦于一 3D目标5分钟之前及之后立即测定张力性调节值 ,取前后差值作为调节滞后值。统计分析采用组间样本t检验方法。结果 :本研究中近视儿童的调节滞后值为 0 .11± 0 .33D ,正视儿童该值为 0 .30± 0 .45D ,两者差异无统计学意义 (P >0 .0 5 )。结论 :环境因素如近距离工作在早发性近视发展中起较小作用。早发性近视与迟发性近视具有不同的发病机理。
Objective: To observe and evaluate the relationship between retardation and myopia in children and explore the pathogenesis of myopia in children. Methods: The tonic and accommodative lag values of 38 children (mean age, 10.1 years) aged 6-14 years were measured by spectroscopic dynamic retinoscopy. Of these, 19 were frontal and 19 were myopic. Open the adjustment ring by observing the DOG optocooler (0. 2 cpd) placed 40 cm in front of the eyes under dim illumination, measure the tonicity adjustment immediately before and after focusing on a 3D target for 5 minutes, and take the difference as the adjustment hysteresis . Statistical analysis using inter-group sample t test. Results: The adjusted lagged value of myopic children in this study was 0.11 ± 0.33D, while the positive value of children was 0.30 ± 0.45D, with no significant difference (P> 0.05). Conclusion: Environmental factors such as short-distance work play a minor role in the development of early-onset myopia. Early onset of myopia and delayed myopia have different pathogenesis.