TABLE 1.
Mean values of main topographic parameters.
| Parameters | KC group | Control group | ||
|---|---|---|---|---|
| Mean ± SD | Range | Mean ± SD | Range | |
| FK1 (D) | 47.35 ± 6.54 | 35.82 to 73.38 | 42.46 ± 1.33 | 38.41 to 46.09 |
| FK2 (D) | 50.88 ± 8.17 | 37.17 to 83.54 | 43.46 ± 1.49 | 38.82 to 47.33 |
| FKm (D) | 49.02 ± 7.19 | 36.48 to 75.04 | 42.96 ± 1.37 | 38.66 to 46.66 |
| FKmax (D) | 57.64 ± 13.70 | 40.33 to 117.13 | 44.27 ± 1.72 | 39.25 to 54.64 |
| BK1 (D) | −6.85 ± 1.21 | −12.20 to −3.64 | −5.96 ± 0.21 | −6.45 to −5.37 |
| BK2 (D) | −7.60 ± 1.47 | −12.98 to −5.60 | −6.34 ± 0.25 | −7.29 to −5.68 |
| BKm (D) | −7.19 ± 1.29 | −12.58 to −5.19 | −6.15 ± 0.22 | −6.76 to −5.56 |
| BKmax (D) | −9.64 ± 3.28 | −24.64 to −5.90 | −6.53 ± 0.33 | −9.35 to −5.78 |
| CTV (μm) | 469.5 ± 53.7 | 289 to 632 | 546.6 ± 33.4 | 464 to 644 |
| TCT (μm) | 454.6 ± 57.2 | 280 to 622 | 542.1 ± 34.3 | 381 to 641 |
SD = standard deviation; KC = keratoconus; FK1 = front flat keratometry; FK2 = front steep keratometry; FKm = front mean keratometry; FKmax = front maximum keratometry; BK1 = back flat keratometry; BK2 = back steep keratometry; BKm = back mean keratometry; BKmax = back maximum keratometry; CTV = corneal thickness at vertex; TCT = corneal thickness at thinnest point; D = dioptor; μm = micron.