Fig. 2

Cone location by cohort. Location of the cone for 78 eyes with keratoconus (a) for the axial-topography algorithm and (b) for the tangential-topography algorithm. Central cones (light blue) were defined as being within a 1.5 mm radius from the center of the cornea, and peripheral cones (light red) were defined as being outside of a 1.5 mm radius from the center of the cornea. The dark blue line represents the normal distribution curve