Sub-group analysis of relevant changes in astigmatism power and axis in the two-wall and three-wall decompression groups.

*Groups were compared with the Mann-Whitney U-test (two-tailed).Sub-group analysis of relevant changes in astigmatism power and axis in the two-wall and three-wall decompression groups.采用双侧曼-惠特尼U检验（Mann-Whitney U-test）对各组进行组间比较。针对二壁减压组与三壁减压组的散光度数（astigmatism power）及散光轴位（axis）的相关变化开展亚组分析。