Fig. (1) Screenshot from the Ocular Response Analyser showing the applanation signal at inward and outward applanation (red peaks). Corneal Hysteresis (CH) is defined as the difference in the applied pressure during the first and second applanation. CRF: Corneal Resistance Factor. IOPg: Goldman Correlated Intraocular Pressure. IOPcc: Corneal Compensated Intraocular Pressure. CCT: Central Corneal Thickness.