目的：研究不同近视程度儿童中心凹下脉络膜厚度(SFCT)变化及其影响因素。

方法：前瞻队列性研究。选取5～14岁的近视儿童患者45例89眼，并根据等效球镜度(SE)分为不同的屈光组，其中轻度组27眼，中度组42眼，高度组20眼。应用光学相干断层扫描仪的加强深度扫描模式(EDI-OCT)测量中心凹下脉络膜厚度(SFCT)，比较近视各组间的SFCT变化规律，并对相关影响因素进行分析。

结果：轻度、中度和高度近视组SFCT分别为253.22±43.56、223.19±54.93、185.90±50.99μm(P<0.05)； Pearson相关性分析发现：SFCT与SE、眼轴长度(AL)、视网膜神经纤维层(RNFL)厚度有明显相关性(r=0.430、-0.499、0.425，均P<0.001)； 与K1、K2略相关(P<0.05)。近视各组间近视家族史构成比有差异(χ²=7.44，P<0.05)。

结论：儿童近视程度越深，SFCT越薄，AL与SFCT相关性略优于屈光度，且儿童近视程度与近视家族史有关。

METHODS: This is prospective cohort study. Eighty-nine eyes of 45 school-age children aged 5-14 years old were studied, and according to the equivalent sphericity(SE)into different refractive groups. Mild, moderate and high myopia groups had 27, 42 and 20 eyes respectively, apply the enhanced depth scanning mode(EDI-OCT)of an optical coherence tomography(OCT)scanner to measure SFCT to compare choroid thickness differences among myopia groups, to find out the change rule of SFCT between myopia groups, and Pearson correlation analysis was used to analyze the related influencing factors.

RESULTS:SFCT of mild myopia, moderate myopia and high myopia respectively were(253.22±43.56)μm,(223.19±54.93)μm,(185.90±50.99)μm, SFCT differences between different refractive groups were statistically significant(P<0.05), Pearson correlation analysis found that there was a significant correlation between SFCT and SE and axial length(r=0.430, -0.499, 0.425, all P<0.001); slightly related to K1 and K2, and the correlation of AL, retinal nerve fiber layer(RNFL)thickness were better than that of SE. There were statistically significant differences in family history of myopia among the myopic groups(χ²=7.44, P<0.05).

CONCLUSION: The degree of myopia in children was deepened and SFCT became thinner. The degree of myopia in children is related to the family history of myopia.