B Kamppeter1, R F Degenring, J B Jonas. 1. Universitätsaugenklinik Mannheim, Fakultät für Klinische Medizin, Ruprechts-Karls-Universität Heidelberg, Mannheim. Bernd.Kamppeter@augen.ma.uni-heidelberg.de
Abstract
PURPOSE: A photo-stress test was conducted at the subjective contrast threshold to evaluate whether psychophysical differences could be detected between chronic open-angle glaucoma patients and normal subjects. METHODS: The prospective, comparative, clinical observational study included 20 patients (29 eyes) with chronic open-angle glaucoma and 20 control subjects (29 eyes). The study groups did not vary significantly in age and refractive error, but visual acuity showed a difference of 0.16. All participants underwent photo-stress using the Kontrastometer BA4. RESULTS: In the glaucoma group compared with the control group, the mean contrast threshold was significantly higher and the readaptation time significantly longer. The latter correlated significantly with the papillo-morphological glaucoma stage. CONCLUSIONS: In patients with chronic open-angle glaucoma, the foveal recovery time after a photo-stress test is significantly prolonged compared with normal subjects. It may suggest involvement of the fovea in glaucoma even if the visual acuity is 20/20.
PURPOSE: A photo-stress test was conducted at the subjective contrast threshold to evaluate whether psychophysical differences could be detected between chronic open-angle glaucomapatients and normal subjects. METHODS: The prospective, comparative, clinical observational study included 20 patients (29 eyes) with chronic open-angle glaucoma and 20 control subjects (29 eyes). The study groups did not vary significantly in age and refractive error, but visual acuity showed a difference of 0.16. All participants underwent photo-stress using the Kontrastometer BA4. RESULTS: In the glaucoma group compared with the control group, the mean contrast threshold was significantly higher and the readaptation time significantly longer. The latter correlated significantly with the papillo-morphological glaucoma stage. CONCLUSIONS: In patients with chronic open-angle glaucoma, the foveal recovery time after a photo-stress test is significantly prolonged compared with normal subjects. It may suggest involvement of the fovea in glaucoma even if the visual acuity is 20/20.