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Corneal hysteresis in normal subjects and in patients with primary open-angle glaucoma and pseudoexfoliation glaucoma
1Glaucoma Department, St. Eriks Eye Hospital, Karolinska Institutet, Stockholm, Sweden.
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.
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