Fig. 1From: Study of association between corneal shape parameters and axial length elongation during orthokeratology using image-pro plus softwareImage-Pro Plus software was used to evaluate the corneal shape parameters. (A) The treatment zone (TZ) area is manually delineated in green. (B) Manual measuring of the eccentric distance. (C) The peripheral steepened zone (PSZ) area is represented in yellow. (D) The pupillary PSZ area is delineated in yellowBack to article page