Table 1 Preliminary analysis of the preoperative corneal astigmatism orientation groups. (average axial length eyes, i.e., eyes with axial lengths greater than 22.0 mm and less than 25.0 mm)
| 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 |