Distributions of corneal hysteresis (CH), corneal resistance factor (CRF), non-contact tonometer intraocular pressure (IOP), and corneal compensated intraocular pressure (IOPcc). On the basis of one-sample Kolmogorov–Smirnov test, (a) CH, (b) CRF, (c) IOP, and (d) IOPcc were normally distributed (P=0.98, 0.48, 0.52, and 0.60, respectively).