Corneal hysteresis in normal subjects and in patients with primary open-angle glaucoma and pseudoexfoliation glaucoma.

PURPOSE: To identify differences in corneal hysteresis (CH) between primary open-angle glaucoma (POAG), pseudoexfoliative glaucoma patients (PXSG) and a healthy control group.

METHODS

In this retrospective study, CH was measured with the Ocular Response Analyzer. 90 subjects were evaluated, 30 subjects in each group. One eye per subject was analyzed.

RESULTS

In normal eyes, POAG and PXSG, CH was 9.8±1.6, 9.0±1.9 and 8.0±1.5 mm Hg, respectively. CH was significantly lower in PXSG patients than in POAG (p=0.042) and normal patients (p=0.0001), but no significance was found between the POAG and the normal group (p=0.23).

CONCLUSION

CH differs in the different groups and might be considered in glaucoma evaluation. Further studies with larger sample sizes are needed.