Table 4.

Distances between Maximum Curvature, Minimum Pachymetry and Maximum Stress, Minimum Stress

	KCN	NRL	P
Distance of Cspot-max to CCSmax, mm	2.52 ± 0.72 (0.68–5.09)	2.04 ± 0.85 (0.11–4.72)	< 0.0001
Distance of Cspot-max to CCSmin, mm	1.35 ± 1.43 (0.07–5.10)	2.73 ± 1.53 (0.05–5.79)	< 0.0001
P	< 0.0001	< 0.0001
Distance of Pach-min to CCSmax, mm	2.03 ± 0.97 (0.39–5.04)	0.79 ± 0.92 (0.04–3.77)	< 0.0001
Distance of Pach-min to CCSmin, mm	1.88 ± 1.06 (0.09–4.29)	3.17 ± 0.38 (2.02–4.00)	< 0.0001
P	Not significant	< 0.0001

CCSmax = maximum zone of corneal contribution to stress; CCSmin = minimum zone of corneal contribution to stress; Cspot-max = maximum zone of tangential curvature; KCN = keratoconus; NRL = normal control; Pach-min = minimum zone of thickness. Data expressed as mean ± standard deviation (range).