Table 1.
Mean and SD of visual acuity, refractive errors and topography data separately in the two groups (n = 100 eyes).
| Abnormal elevation | Back corneal surface (n = 47) | Both corneal surfaces (n = 53) | p value | ||
|---|---|---|---|---|---|
| Mean ± SD (95% CI) | Range | Mean ± SD (95% CI) | Range | ||
| Variables | |||||
| UDVA (decimal) | 0.51 ± 0.29 (0.42, 0.60) | 0.08 to 1.00 | 0.32 ± 0.22 (0.26, 0.38) | 0.01 to 0.90 | 0.002 |
| CDVA (decimal) | 0.93 ± 0.11 (0.89, 0.96) | 0.60 to 1.00 | 0.70 ± 0.23 (0.64, 0.77) | 0.08 to 1.00 | < 0.001 |
| Sphere (D) | − 0.89 ± 1.19 (− 1.24, -0.54) | − 3.75 to 1.00 | − 2.03 ± 2.81 (− 2.81, − 1.26) | − 11.50 to 2.75 | 0.071 |
| Cylinder (D) | − 1.73 ± 1.17 (− 2.08, − 1.39) | − 4.75 to 0.00 | − 4.14 ± 1.90 (− 4.66, − 3.61) | − 8.50 to − 0.25 | < 0.001 |
| Axis (º) | 87.11 ± 63.48 (68.47, 105.75) | 0.0 to 180 | 90.42 ± 59.47 (74.02, 106.81) | 3.0 to 179.0 | 0.920 |
| SE (D) | − 1.76 ± 1.34 (− 2.15, − 1.36) | − 5.00 to 0.38 | − 4.10 ± 3.10 (− 4.96, − 3.25) | − 14.38 to − 0.13 | < 0.001 |
| Mean-KR (D) | 45.24 ± 1.87 (44.69, 45.79) | 41.09 to 49.42 | 48.89 ± 3.41 (47.95, 49.83) | 42.89 to 60.11 | < 0.001 |
| CA (D) | 2.40 ± 1.43 (1.98, 2.82) | 0.35 to 5.88 | 5.25 ± 1.90 (4.72, 5.77) | 1.41 to 9.31 | < 0.001* |
| CA-Axis (º) | 98.82 ± 63.41 (80.21, 117.44) | 3.00 to 177.00 | 86.30 ± 58.13 (70.27, 102.32) | 1.00 to176.00 | 0.337 |
SD standard deviation, CI confidence interval, UDVA uncorrected distance visual acuity, CDVA corrected distance visual acuity, SE spherical equivalent, KR keratometry reading, CA corneal astigmatism; *parametric statistics.