Table 1.
Main characteristics of the sample evaluated
| Mean (SD) | Median | Range | |
|---|---|---|---|
| Age (years) | 47.8 (8.3) | 47.0 | 23.0 to 65.0 |
| Mean central corneal radius (mm) | 7.92 (0.30) | 7.86 | 7.26 to 8.84 |
| Mean central corneal astigmatism (D) | 0.82 (0.59) | 0.75 | 0.00 to 3.75 |
| Manifest sphere (D) | −0.43 (2.02) | 0.00 | −7.00 to 6.00 |
| Manifest cylinder (D) | −0.40 (0.75) | 0.00 | −4.00 to 0.00 |
| Manifest spherical equivalent (D) | −0.63 (2.03) | 0.00 | −7.33 to 5.50 |
| Corneal eccentricity | 0.34 (0.31) | 0.43 | −1.16 to 0.83 |
Abbreviations: SD standard deviation, D diopter