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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

Glaucoma is an eye condition characterized by increased intraocular pressure that damages the retina and optic nerve, leading to irreversible blindness if left untreated. The human eye has various components, including the cornea, iris, pupil, lens, and optic nerve. Aqueous humor is secreted by the epithelium of the ciliary body in the posterior chamber and flows through the trabecular meshwork and canal of Schlemm, maintaining normal intraocular pressure. The trabecular meshwork and the canal...
Open Angle Glaucoma: Treatment01:27

Open Angle Glaucoma: Treatment

In open-angle glaucoma, the iridocorneal angle remains open, but the trabecular meshwork becomes stiff, slowing down the outflow of aqueous humor. This causes a buildup of aqueous humor in the anterior chamber, leading to a sudden increase in intraocular pressure. The treatment for open-angle glaucoma focuses on reducing the elevated intraocular pressure by either decreasing the secretion of aqueous humor or increasing its outflow.
Drugs such as carbonic anhydrase inhibitors, α2- and...

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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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Reading performance in patients with glaucoma evaluated using the MNREAD charts.

Masako Ishii1, Masaaki Seki, Ryoko Harigai

  • 1Division of Ophthalmology and Visual Science, Graduated School of Medical and Dental Sciences, Niigata University, 1-757 Asahimachi, Niigata, 951-8510, Japan.

Japanese Journal of Ophthalmology
|July 10, 2013
PubMed
Summary

Glaucoma patients with good visual acuity experience reduced reading performance. This study quantifies reading difficulties in glaucoma, showing significant declines in reading speed and acuity compared to normal subjects.

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Area of Science:

  • Ophthalmology
  • Visual Neuroscience
  • Clinical Research

Background:

  • Reading performance in glaucoma patients remains understudied.
  • Glaucomatous visual field loss may impact reading, even with preserved visual acuity.
  • This study quantitatively evaluates reading performance in glaucoma.

Purpose of the Study:

  • To investigate the impact of glaucomatous visual field loss on reading performance.
  • To quantitatively assess reading parameters in glaucoma patients with good visual acuity.
  • To compare reading performance between glaucoma patients and age-matched normal subjects.

Main Methods:

  • A cross-sectional, comparative study involving 49 glaucoma patients with early-moderate visual field loss and good visual acuity.
  • Reading performance was assessed using the Japanese version of the Minnesota Reading Acuity Chart (MNREAD).
  • Glaucoma patients were compared to 30 age-matched normal subjects.

Main Results:

  • Glaucoma patients exhibited significantly lower maximum reading speed (MRS), critical print size (CPS), and reading acuity (RA) compared to normal subjects (P < 0.01).
  • Critical print size (CPS) negatively correlated with mean deviation from Humphrey Field Analyzer 10-2 and 30-2 programs in the better eye.
  • The study included 21 men and 28 women, with a mean age of 53.3 ± 12.6 years, and various glaucoma diagnoses.

Conclusions:

  • Reading performance is demonstrably impaired in glaucoma patients, even when they maintain good visual acuity.
  • Glaucomatous visual field deficits contribute to reduced reading efficiency and acuity.
  • Quantitative reading assessments are crucial for understanding functional vision loss in glaucoma.