Related Experiment Video
Updated: Jul 4, 2026
07:11
Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
Published on: May 25, 2020
Current profile of secondary glaucomas
Ritu Gadia1, Ramanjit Sihota, Tanuj Dada
1Glaucoma Research Lab, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India. drgadia@gmail.com
Indian Journal of Ophthalmology
|June 27, 2008
Summary
Secondary glaucoma patients often present with severe vision loss and elevated intraocular pressure (IOP). This study highlights key causes like post-vitrectomy and trauma, emphasizing the need for early detection and management of secondary glaucoma.
Area of Science:
- Ophthalmology
- Glaucoma Research
- Public Health
Background:
- Secondary glaucoma represents a significant portion of glaucoma diagnoses.
- Understanding its incidence and risk factors is crucial for effective management.
Purpose of the Study:
- To determine the current incidence of secondary glaucomas.
- To identify prevalent risk factors associated with secondary glaucoma development.
Main Methods:
- Retrospective chart review of 2997 newly diagnosed glaucoma patients.
- Detailed patient history, vision, intraocular pressure (IOP), and fundus evaluations were performed.
- Demographic data and etiology of secondary glaucoma were systematically recorded.
Main Results:
- 579 patients (21.84%) were diagnosed with secondary glaucoma.
- Common causes included post-vitrectomy (14%), trauma (13%), and corneo-iridic scar (12%).
- A significant proportion of patients presented with vision less than or equal to 20/200 and baseline IOP greater than 30 mm Hg.
Conclusions:
- Secondary glaucoma patients frequently exhibit poor visual acuity and elevated IOP upon presentation.
- Early identification of risk factors and timely intervention are critical for improving outcomes in secondary glaucoma.
Related Concept Videos
01:25Glaucoma: 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...
01:27Open 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...
Drugs such as carbonic anhydrase inhibitors, α2- and...
01:28Angle 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...
01:22Photoreceptors 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...