Corneal hysteresis (CH) is a measurement of the cornea’s ability to dampen the effects of pressure. Studies have linked the viscoelastic properties of the cornea to the lamina cribrosa.16 Due to this link, CH can possibly provide insight of the effect IOP has on the lamina cribrosa. Some of these studies have shown that a lower CH has been shown to be a risk factor for RNFL and VF progression.17
The corneal hysteresis of the patient in the case was measured as 8 OD and OS.
Table showing the normative values for corneal hysteresis. To assess risk in glaucoma
the lower the CH, the greater the risk for glaucoma or glaucomatous progression.18