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Glaucoma: Overview

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: Treatment

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...

Angle Closure Glaucoma: Treatment

Angle Closure Glaucoma: Treatment

Angle-closure glaucoma, or closed-angle glaucoma, is an eye condition where the iris bulges out and blocks the iridocorneal angle, resulting in a buildup of aqueous humor and increased intraocular pressure. Immediate medical attention is necessary due to the sudden onset of symptoms. The treatment for angle-closure glaucoma includes short-term and long-term approaches. Short-term treatment involves using eye drops like pilocarpine to lower intraocular pressure by increasing aqueous humor...

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Related Experiment Video

Updated: Jun 26, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential

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Published on: May 25, 2020

Glaucoma and reading speed: the Salisbury Eye Evaluation project.

Pradeep Y Ramulu¹, Sheila K West, Beatriz Munoz

¹Wilmer Eye Institute, Johns Hopkins University, Baltimore, Maryland 21287, USA. pramulu1@jhmi.edu

Archives of Ophthalmology (Chicago, Ill. : 1960)

|January 14, 2009

Summary

Glaucoma can slow down spoken reading speed, especially in elderly individuals with advanced bilateral vision loss. This condition increases the likelihood of reading impairment, highlighting the impact of eye health on communication abilities.

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Area of Science:

Ophthalmology
Gerontology
Speech Science

Background:

Glaucoma is a leading cause of irreversible blindness globally.
Reading speed is a critical functional measure in the elderly population.
The impact of glaucoma on spoken reading speed is not well-established.

Purpose of the Study:

To investigate the relationship between glaucoma and spoken reading speed.
To identify at which stage of glaucoma reading impairment occurs.

Main Methods:

Utilized data from the Salisbury Eye Evaluation, a population-based study.
Measured spoken reading speed by having subjects read nonscrolling text aloud.
Assessed glaucoma status via optic disc appearance and visual field testing.

Main Results:

1,154 elderly subjects were analyzed for reading speed and glaucoma.
Reading impairment was more prevalent in subjects with bilateral glaucoma (28.4%) compared to those without (16.0%).
Advanced bilateral visual field loss correlated with significantly slower reading speeds and increased odds of impairment.

Conclusions:

A high prevalence of spoken reading impairment exists in the elderly population.
Glaucoma, particularly with advanced bilateral field loss, is associated with slower reading and increased reading impairment.