Azuamah, Y.C.,1 Merem, C.C.,1 Ikoro, N.C.,1 Esenwah, E.C.,1 Megwas, A.U.1 and Daniel-Nwosu, E.1
- Department of Optometry, Federal University of Technology, Owerri
Corresponding Author: Azuamah, Y.C Email: young.azuamah@futo.edu.ng Phone: + 2348034933590
Abstract
Photostress recovery time (PSRT) is a clinical procedure that measures the amount of time required for the macular to return to its normal level of function after being exposed to a bright light source. This study was a case-control clinical study carried out to measure the foveal and extra-foveal photo stress recovery time in participants with primary open-angle glaucoma. Fifty five subjects, 24 with primary open-angle glaucoma with a mean age of 34.38±12.19 and 31 control subjects with a mean age of 26.58±7.23 were used in this study. The mean photostress recovery time measured on the fovea, 7o nasal, temporal, inferior and superior to the fovea were, 62.38±4.67, 8.71±7.19, 11.23±10.96, 12.08±8.96 and 12.44±9.30 respectively for subjects with primary open-angle glaucoma. For the control subjects, the mean photostress recovery time measured on the fovea, 7o nasal, temporal, inferior and superior to the fovea were 23.29±1.63 11.89±8.62, 11.53±8.19, 12.89±8.67 and 13.60±8.36 respectively. Analysis with SPSS version 21 using the two factor ANOVA showed a significant difference (P<0.05) in photostress recovery time 7o nasally, temporally, inferiorly and superior to the fovea between primary open-angle glaucoma subjects and a control group. Data analysis with the independent sample t-test also showed a significant difference (P<0.05) in photostress recovery time on the fovea between primary open-angle glaucoma subjects and a control group. In conclusion, primary open-angle glaucoma alters the photostress recovery time, both on the fovea and extra-foveal region of the retina. Photostress recovery test should be included in the routine eye examination of patients.
Keywords: Primary Open-angle glaucoma, Photostress recovery time, foveal, extra-foveal.