论文部分内容阅读
目的分析近视眼眼轴和角膜表面形态改变的相互关系。方法175例327眼近视，分为低中度、高度和超高度3组，用眼科A／B超仪测量每只眼轴长；用角膜地形图仪检测角膜表面形态，所测数据作组间及相互间比较，统计学分析。结果327眼平均眼轴长为26．46±1.71mm，低中度组为25.08±0.94mm，高度组为26.06±0.83mm，超高度组为28.02±1．50mm，组间差异有显著性意义（P＜0.01）；角膜表面规则性系数（SRI）值为0．28±0．27，角膜表面非对称性系数（SAI）值为0．96±0．53，平均角膜屈光力（ACP）值为43.91±1．42D，角膜表面散光（CYL）值为1．92±0．90D，其中CYL值组间差异有显著性意义，其余各参数组间无显著性差异（P＞0.05）。眼轴值与CYL值呈正相关。结论近视眼眼轴较正视眼眼轴长，随着近视屈光度的增大，角膜非对称性加大，角膜散光也增大，而角膜屈光力无明显改变。近视眼眼轴变长是屈光度增加的主要原因，比角膜屈光力的改变更具决定意义。
Objective To analyze the relationship between the axial and corneal surface changes in myopia. Methods A total of 327 eyes (175 eyes) with myopia were divided into three groups: low, medium, high and high. The axial length of each eye was measured by Ophthalmology A / B Ultrasonography. The corneal topography was measured by corneal topography. And compared with each other, statistical analysis. Results The average axial length of 327 eyes was 26.46 ± 1.71mm, the low-medium group was 25.08 ± 0.94mm, the height group was 26.06 ± 0.83mm, the super-height group was 28.02 ± 1.50mm, there was significant difference between groups (P <0.01). The corneal surface regularity coefficient (SRI) was 0.28 ± 0.27 and the corneal surface asymmetry coefficient (SAI) was 0.96 ± 0.53. The mean corneal refractive power (ACP) (43.91 ± 1.42D). The corneal surface astigmatism (CYL) value was 1.92 ± 0.90D. There was a significant difference between the two groups (P> 0.05). Axial values and CYL values were positively correlated. Conclusion The axial length of myopia is higher than that of the normal ocular. As the refraction of myopia increases, the asymmetry of the cornea increases and the corneal astigmatism increases. However, the corneal refractive power has no significant change. Long axial myopia is the main reason for the increase of refraction, more than the change of corneal refractive power is more decisive.