Subclinical Keratoconus: The Need for an Objective Classification System
Arbelaez et al reported the use of a support vector machine for the detection of keratoconus and subclinical keratoconus by topographic and tomographic data. The authors defined subclinical keratoconus as corneas presenting topographic and tomographic pattern of localized steepening in the posterior or anterior corneal surface or paracentral corneal thinning, with a best corrected visual acuity of 20/20 or better, without clinical (keratometric, retinoscopic, or biomicroscopic) signs of keratoconus.