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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...
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Related Experiment Video

Updated: Jun 6, 2026

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation
08:30

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

Published on: March 12, 2016

Normal-tension glaucoma (Low-tension glaucoma).

Douglas R Anderson1

  • 1Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, USA. danderson@med.miami.edu

Indian Journal of Ophthalmology
|December 15, 2010
PubMed
Summary
This summary is machine-generated.

Normal-tension glaucoma (NTG) involves optic nerve damage without high intraocular pressure (IOP). Diagnosis requires identifying optic nerve vulnerability signs and ruling out other causes, with management focused on lowering IOP.

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Last Updated: Jun 6, 2026

Glaucoma-inducing Procedure in an In Vivo Rat Model and Whole-mount Retina Preparation
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08:55

Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments

Published on: April 24, 2020

Area of Science:

  • Ophthalmology
  • Neurology

Background:

  • Glaucoma is characterized by optic nerve head abnormalities interacting with intraocular pressure (IOP).
  • Normal-tension glaucoma (NTG) is diagnosed when optic nerve damage occurs without significantly elevated IOP.
  • NTG diagnosis relies on identifying specific optic nerve vulnerabilities and visual field defects.

Purpose of the Study:

  • To define the diagnostic criteria for normal-tension glaucoma (NTG).
  • To outline the management principles for NTG.
  • To discuss the role of vascular and neurological factors in NTG.

Main Methods:

  • Clinical assessment of optic nerve head and visual fields.
  • Evaluation of intraocular pressure (IOP) levels.
  • Consideration of associated symptoms like vascular dysregulation and family history.

Main Results:

  • NTG diagnosis involves recognizing optic nerve vulnerability signs, such as peripapillary changes and disc hemorrhages.
  • Associated factors include vascular dysregulation, family history, and potentially hemodynamic crises or sleep apnea.
  • Many NTG cases are non-progressive, necessitating careful monitoring before aggressive treatment.

Conclusions:

  • NTG management aims to lower IOP to prevent visual disability, similar to other glaucomas.
  • Assessing the progression rate is crucial for determining the aggressiveness of NTG therapy.
  • Current neuroprotective and blood flow-improving strategies have not yet demonstrated efficacy in NTG.