From: Investigating the impact of preoperative corneal astigmatism orientation on the postoperative spherical equivalent refraction following intraocular lens implantation
Descriptive statistics
Mean (M)
Sample size (N)
Std. deviation (SD)
Std. error mean (SEM)
Group 1 (ATR)
0.819
88
0.420
0.045
Group 2 (WTR)
0.827
138
0.376
0.032
Group 3 (OB)
0.677
62
0.387
0.049