For a study, researchers’ goal was to evaluate the repeatability of CH calculations in glaucoma patients over time, during routine follow-up, and after cataract surgery. Corneal hysteresis (CH) measurements were relatively stable during routine follow-up of glaucoma patients over an intermediate time frame. Cataract surgery did not differ from the CH, particularly after a mean of 6 months follow-up. Retrospective research of patient records in a glaucoma clinic where routine measurements by the Ocular Response Analyzer were processed. Patients with a minimum of 2 CH evaluations were involved. Repeatability was studied using the intraclass correlation coefficient (ICC). A total of 164 eyes (87 patients) were included. However, 28 of them had measurements before and after cataract surgery, with an average follow-up time between 29.64 and 9.63 weeks. A variation in CH between the before and after cataract surgery calculations were not proved (ICC=0.79, 95% CI: 0.60-0.89). Without any surgical treatment between measurements, there was an agreement among the repeated CH measurements (ICC=0.64, 95% CI: 0.61-0.82) with an average time between 32.06 ± 25.32 weeks between the first and last measurement in the left 136 eyes. CH measurements in glaucoma patients were replicable over a 6-month period while the follow-up of the routine or cataract surgery followed. Outcomes recommended that the intraocular pressure reduction following cataract surgery was not likely to be because of a change in the biomechanical property.

Source: journals.lww.com/glaucomajournal/Fulltext/2022/07000/Repeatability_of_Corneal_Hysteresis_Measurements.14.aspx