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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...
Angle Closure Glaucoma: Treatment01:28

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...
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...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
Photoreceptors and Visual Pathways01:22

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...
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Drug Dosing: Geriatric Patients

Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...

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Related Experiment Video

Updated: Jun 20, 2026

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
11:49

Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application

Published on: March 8, 2019

Lens-induced glaucoma in the elderly.

Dimitris Papaconstantinou1, Ilias Georgalas, Nikos Kourtis

  • 1Department of Ophthalmology, University of Athens, Athens, Greece. dpapaconstantinou@hotmail.com

Clinical Interventions in Aging
|August 22, 2009
PubMed
Summary
This summary is machine-generated.

Lens-induced glaucoma involves the crystalline lens causing increased intraocular pressure in older adults. This review covers predisposing factors, symptoms, and treatments, analyzing visual outcomes and risks from two studies.

Keywords:
glaucomaintraocular pressure

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Last Updated: Jun 20, 2026

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Published on: March 8, 2019

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents
10:10

Full-Circle Cauterization of Limbal Vascular Plexus for Surgically Induced Glaucoma in Rodents

Published on: February 15, 2022

Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Age-Related Eye Diseases

Background:

  • Lens-induced glaucoma is a group of conditions in the elderly.
  • The crystalline lens plays a key role in elevated intraocular pressure.

Purpose of the Study:

  • To review the predisposing factors, physiology, signs, symptoms, and therapeutic approaches for lens-induced glaucoma.
  • To analyze visual results and risk factors from two relevant studies.

Main Methods:

  • Literature review of lens-induced glaucoma.
  • Analysis of two specific case studies.
  • Discussion of predisposing factors, clinical presentation, and management.

Main Results:

  • Identified key anatomical and physiological factors contributing to lens-induced glaucoma.
  • Detailed the clinical signs, symptoms, and effective therapeutic strategies.
  • Evaluated visual outcomes and risk factors in the context of the reviewed studies.

Conclusions:

  • The crystalline lens is a critical factor in the pathogenesis of specific glaucomatous conditions in the elderly.
  • Understanding predisposing factors and clinical presentation is crucial for effective management and improved visual prognosis.