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Visual acuity loss in open‐angle glaucoma patients: causes and risk factor
Author(s) -
AYCHOUA N,
JANSONIUS NM
Publication year - 2014
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2014.3423.x
Subject(s) - visual acuity , medicine , ophthalmology , glaucoma , visual field , visual field loss , risk factor , optometry , logistic regression
Purpose To identify causes of visual acuity loss in open angle‐glaucoma (OAG) patients and to determine associated risk factors. Methods From the visual field database of the University Medical Center Groningen, 400 patients with at least 3 reliable visual fields were randomly selected. Of these, 233 had OAG. OAG patients with a visual acuity of 0.5 or less in at least one eye were considered as cases; controls had to have a visual acuity above 0.5 in both eyes. Causes of visual acuity loss were determined from the medical records. Potential risk factors for visual acuity loss in OAG (age, gender, myopia, baseline IOP, corneal thickness, and visual field mean deviation [MD]) were assessed by comparing cases with acuity loss due to OAG with the controls, using logistic regression. Results Of the 233 patients with OAG, 134 (57%) were cases and 99 (43%) controls. Concerning the cases, visual acuity loss was caused by OAG in 40%, cataract 17%, AMD 14%, vitreo‐retinal surgery 10%, corneal pathology 4.5%, acquired retinal disorders 10%, and neuro‐ophthalmological disorders 4.5%. Among the assessed risk factors, cases had a lower MD (OR=0.90; P<0.001) and a higher age (OR=1.05; P=0.015). Conclusion Visual acuity loss in OAG is common but mostly due to other eye co‐morbidities. A lower MD and an older age were highly significant risk factors.