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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...

Photoreceptors and Visual Pathways

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...

Diabetic Retinopathy

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...

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Related Experiment Video

Updated: May 19, 2026

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation

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Published on: March 12, 2016

Impact of glaucoma on visual functioning in Indians.

Vijaya K Gothwal¹, Shailaja P Reddy, Seelam Bharani

¹Meera and L B Deshpande Centre for Sight Enhancement, Vision Rehabilitation Centres, Hyderabad, India. vijayagothwal@gmail.com

Investigative Ophthalmology & Visual Science

|August 11, 2012

Summary

Glaucoma significantly impacts daily activities and mobility for Indian patients, particularly those with severe vision loss. Early intervention is crucial to minimize activity limitations and preserve quality of life.

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Last Updated: May 19, 2026

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation

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Published on: February 15, 2022

Area of Science:

Ophthalmology and Vision Science
Public Health and Epidemiology

Background:

Glaucoma is a leading cause of irreversible blindness worldwide, affecting millions.
Visual functioning impairments in glaucoma patients can significantly impact daily life and mobility.
Understanding these impacts is crucial for developing targeted interventions, especially in diverse populations like India.

Purpose of the Study:

To evaluate the impact of glaucoma on visual functioning in Indian patients.
To assess the relationship between the severity of visual field loss and quality of life.
To validate a culturally relevant questionnaire for assessing glaucoma-related activity limitations.

Main Methods:

198 Indian glaucoma patients underwent comprehensive evaluations.
Visual field loss severity was classified using Humphrey Field Analyzer (mean deviation).
The Glaucoma Quality of Life-15 (GQL-15) questionnaire was administered and validated using Rasch analysis, resulting in the Glaucoma Activity Limitation-10 (GAL-10).

Main Results:

Severe visual field loss was reported by 39% of participants.
Multivariate analyses revealed that participants with severe visual field loss and middle-income status reported significantly poorer functioning on the GAL-10.
Despite statistical significance, the observed associations were not clinically significant, suggesting a need for further investigation into contributing factors.

Conclusions:

Glaucoma patients in India, especially those with severe visual field loss, experience substantial challenges in daily tasks and mobility.
Preventing glaucoma progression is vital to minimize activity limitations and enhance the quality of life for affected individuals.
The validated Glaucoma Activity Limitation-10 (GAL-10) provides a reliable tool for assessing functional impairments in this population.