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)
−0.132
88
0.475
0.051
Group 2 (WTR)
0.026
138
0.497
0.042
Group 3 (OB)
−0.130
62
0.479
0.0609