Change and the direction of rotation of the steep axis.

Distribution of all cases depending on the amount of change in the degree of the steep axis and the direction of the rotation of the steep axis. Analyses were performed using topographic parameters measured at the 3-mm zone (Orbscan II).Change and the direction of rotation of the steep axis.所有病例的分布情况取决于角膜陡轴（steep axis）的屈光度变化幅度与陡轴旋转方向。本分析采用Orbscan II设备在3mm区域采集的角膜地形图参数（topographic parameters）完成。角膜陡轴的变化量与旋转方向。