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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...
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...

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Related Experiment Video

Updated: Jun 1, 2026

Implantation Protocol of the Foldable Capsular Vitreous Body for Complex Vitreoretinal Surgery
04:36

Implantation Protocol of the Foldable Capsular Vitreous Body for Complex Vitreoretinal Surgery

Published on: April 14, 2026

Vitreous substitutes: a comprehensive review.

Teri T Kleinberg1, Radouil T Tzekov, Linda Stein

  • 1Department of Ophthalmology, University of Massachusetts Medical School, Worcester, USA.

Survey of Ophthalmology
|May 24, 2011
PubMed
Summary
This summary is machine-generated.

Vitreoretinal surgery uses various substitutes, but a permanent, viable option is still needed. Research into synthetic polymers shows promise for future long-term vitreous replacement.

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Related Experiment Videos

Last Updated: Jun 1, 2026

Implantation Protocol of the Foldable Capsular Vitreous Body for Complex Vitreoretinal Surgery
04:36

Implantation Protocol of the Foldable Capsular Vitreous Body for Complex Vitreoretinal Surgery

Published on: April 14, 2026

Whole Vitreous Humor Dissection for Vitreodynamic Analysis
04:41

Whole Vitreous Humor Dissection for Vitreodynamic Analysis

Published on: May 24, 2015

Dissection of Human Vitreous Body Elements for Proteomic Analysis
05:05

Dissection of Human Vitreous Body Elements for Proteomic Analysis

Published on: January 23, 2011

Area of Science:

  • Ophthalmology and Biomaterials Science
  • Investigating ocular disease treatment and surgical interventions.

Background:

  • Vitreoretinal disorders represent a substantial category of treatable eye conditions.
  • Modern vitreoretinal surgery relies on various vitreous substitutes, each with unique properties and limitations.

Purpose of the Study:

  • To review current and experimental vitreous substitutes used in ophthalmology.
  • To classify these substitutes based on functionality, composition, and properties.
  • To define the ideal characteristics of a permanent vitreous substitute.

Main Methods:

  • Comprehensive review of existing literature on vitreous substitutes.
  • Classification of substitutes by their clinical function, material composition, and physical properties.
  • Analysis of the advantages and disadvantages of each substitute type.

Main Results:

  • Currently available substitutes include air, balanced salt solutions, perfluorocarbons, expansile gases, and silicone oil.
  • Attempts at permanent vitreous replacement using collagen, hyaluronic acid, and hydrogels have not been clinically successful.
  • Experimental research indicates potential in synthetic polymers for long-term vitreous substitution.

Conclusions:

  • A definitive, long-term, and clinically viable vitreous substitute has yet to be identified.
  • The development of synthetic polymers offers a promising avenue for future research in permanent vitreous replacement.
  • Further biomaterials research is crucial for creating ideal vitreous substitutes with long-term viability and biocompatibility.