The Correlation between Corneal Findings and Disease Severity in Keratoconus per Scheimpflug Corneal Tomography

Table 2

Linear regression analysis for eyes with apical scarring vs. eyes with Fleischer rings but no scarring (n = 25 vs. 36).

Parameter	Coefficient	value	95% confidence interval
Front K1 (D)	12.9	<0.001	8.396–17.42
Front K2 (D)	12.9	<0.001	7.237–18.59
Front Km (D)	13.8	<0.001	9.105–18.6
Front astigmatism (D)	2.0	0.009	0.535–3.519
Back K1 (D)	−1.7	0.002	−2.664–−0.657
BACK K2 (D)	−2.9	<0.001	−4.217–−1.544
Back Km (D)	−2.1	<0.001	−3.012–−1.285
Back astigmatism (D)	0.4	0.179	−0.171–−0.898
Thinnest pachymetry (μm)	−75.1	<0.001	−113.82–−36.44

K1 = flat keratometry, K2 = steep keratometry, Km = mean keratometry, D = diopters.