Crosslinking vs. Observation in Fellow Eyes of Keratoconus Patients

Table 4

Proposed tomographic cutoff values for KCN disease progression in naïve fellow eyes (N = 49).

Variable	Cutoff value	Sensitivity (%)	Specificity (%)	% Correctly Classified
K1	≥43.5	78.95	66.67	71.43%
K2	≥45.1	84.21	66.67	73.47%
Km	≥44.3	78.95	63.33	69.39%
Front Kmax	≥47.9	84.21	76.67	79.59%
Astigmatism	≥1.4	94.74	60.00	73.47%
Pachymetry at the pupil	<475	93.33	63.16	81.63%
Thinnest pachymetry	<478	80.00	73.68	77.55%

Percent of naïve fellow eyes correctly classified as progressors or nonprogressors using the predetermined cutoff values. All keratometry readings are presented in Diopters and pachymetry values are presented in μm.