Chicago—Reading speed is reduced in patients with glaucomatous visual field loss and normal visual acuity, and the reduction in performance is directly proportional to the extent of the visual field loss, said Aron Guimaraes, MD.
“Several studies using self-reported measures have shown that patients with glaucoma have difficulty with reading performance, and there are also clinical studies showing reading speed is reduced in glaucoma patients,” said Dr. Guimares, Department of Ophthalmology, State University of Campinas, Brazil. “However, most of the latter investigations included patients with varied visual acuities, making it unclear whether the changes in reading speed were secondary to visual acuity deficit or visual field loss.
“Therefore, we investigated reading performance in patients with glaucoma and 20/20 visual acuity,” he said.
The cross-sectional study included 35 patients with primary open-angle glaucoma and 35 age-matched healthy controls. All participants had 20/20 visual acuity in the tested eye and a minimum of 8 years of schooling. The glaucoma patients and controls were well matched in terms of eye investigated, gender, mean age, and mean education.
Monocular reading performance was assessed using a validated Portuguese version of the Minnesota low vision reading test under a fixed luminance (85 cd/m2) at a distance of 40 cm with appropriate refractive correction.