论文部分内容阅读
目的探讨儿童高度近视眼的各屈光成份与近视发生的相关性。方法对38人73眼儿童高度近视患者分别进行散瞳验光,采集角膜不规则指数CIM、角膜形状系数SF与模拟角膜Simk1、Simk2,前房深度、晶体厚度、眼轴长度,并作角膜屈折力/眼轴长比值。结果屈光度为-6.0D～24.5D,平均球镜度为(10.23D±3.75)D;Simk1为(44.00±1.48)D,Simk2为(45.45±1.52)D,K值为42.86±9.09,角膜不规则指数CIM为0.73±0.35,角膜形状系数SF为0.27±0.08;前房深度(3.56±0.43)mm,晶体厚度(3.94±0.41)mm,眼轴长度(27.22±2.34)mm;角膜屈折力/眼轴长比值为1.66±0.15。屈光度与Simk2、前房深度、晶体厚度、眼轴长度、角膜屈折力/眼轴长比值间均有显著相关性,P<0.05;角膜不规则指数CIM、角膜形状系数SF与Simk1、Simk2均无统计意义的相关性,P>0.05。结论儿童高度近视患者以轴长为主,角膜屈光力与眼轴不匹配时便导致近视的发生和发展;儿童高度近视患者SF值小于正视眼,CIM大于正视眼,影响了成像质量,负反馈引起眼后段发育生长加快;高度近视儿童角膜屈光力的变化与角膜形状系数、角膜不规则指数的变化不相匹配,打破了眼球正常发育所需的协调性,可能引发了近视的产生。
Objective To investigate the correlation between refractive errors and myopia in children with high myopia. Methods Totally 38 patients (73 eyes) with high myopia were examined by mydriatic optometry. Corneal irregularity index (CIM), corneal shape coefficient (SF), simulated corneal Simk1, Simk2, anterior chamber depth, crystal thickness and axial length were collected. / Axial length ratio. Results The average degree of refraction was -6.0D ~ 24.5D, mean spherical degree was (10.23D ± 3.75) D, Simk1 was (44.00 ± 1.48) D, Simk2 was (45.45 ± 1.52) D, K was 42.86 ± 9.09. The regular index CIM was 0.73 ± 0.35, the corneal shape coefficient SF was 0.27 ± 0.08, the depth of the anterior chamber was 3.56 ± 0.43 mm, the thickness of the lens was 3.94 ± 0.41 mm, and the axial length was 27.22 ± 2.34 mm. The corneal refractive power / The axial length ratio was 1.66 ± 0.15. There was significant correlation between diopter and Simk2, anterior chamber depth, crystal thickness, axial length and corneal refractive power / axial length ratio, P <0.05; corneal irregularity index CIM, corneal shape coefficient SF and Simk1, Simk2 Statistical significance of correlation, P> 0.05. Conclusion The majority of children with high myopia axial length, corneal refractive power does not match with the axial axis will lead to the occurrence and development of myopia; Children with high myopia SF value less than the eyes, CIM greater than the eyes, affecting the imaging quality, negative feedback caused The rapid development of the posterior segment of the eye; changes in children with high myopia corneal refractive power and corneal shape factor, corneal irregularity index changes do not match the breaking of the ocular coordination required for normal development may lead to myopia.