Table 1.

Description of the study groups in mean±standard deviation (range)

Group	Classification	Kmean (D)	Kmax (D)	Pachymin (µm)	Astig (D)	I-S value
Pentacam	Normal (n=945)	43.84±1.36 (40.00–48.40)	45.15±1.58 (40.60–52.20)	545.66±28.81 (460–669)	1.50±0.82 (0.10–7.30)	0.34±0.56 (−1.46–2.35)
	Subclinical KC (n=98)	44.68±1.56 (41.00–48.10)	46.57±1.64 (43.40–51.60)	524.18±29.95 (453–601)	2.11±1.17 (0.10–5.00)	0.83±0.77 (−1.57–3.01)
	KC (n=625)	47.93±4.50 (40.00–66.20)	55.23±7.79 (43.30–81.50)	469.69±39.98 (322–570)	4.67±2.94 (0.2–15.1)	3.95±3.31 (−3.39–18.53)
Combined Pentacam-Corvis	Normal (n=320)	43.68±1.28 (40.00–48.40)	45.04±1.52 (40.90–52.20)	545.27±27.53 (478–629)	1.56±0.90 (0.20–7.30)	0.33±0.59 (−1.32–2.35)
	Subclinical KC (n=48)	44.96±1.79 (42.20–48.10)	46.96±1.88 (43.40–51.60)	524.18±29.95 (453–601)	2.15±1.36 (0.10–5.00)	0.96±0.79 (−0.38–3.01)
	KC (n=243)	47.36±3.88 (40.00–66.20)	53.88±6.73 (43.30–78.80)	474.71±37.29 (356–570)	4.25±2.66 (0.2–13.8)	3.71±2.84 (−2.38–13.35)

Classification was based on consensus of experts. Kmean: Mean keratometry, Kmax: Maximum keratometry, Pachymin: Minimum pachymetry, Astig: Astigmatism, I-S value: Inferior-superior value, n: Number of images, KC: Keratoconus