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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: Jul 11, 2026

Doppler Optical Coherence Tomography of Retinal Circulation
10:46

Doppler Optical Coherence Tomography of Retinal Circulation

Published on: September 18, 2012

Minimum distance mapping using three-dimensional optical coherence tomography for glaucoma diagnosis.

Boris Povazay1, Bernd Hofer, Boris Hermann

  • 1Cardiff University, School of Optometry and Vision Sciences, Biomedical Imaging Group, Cardiff, Wales CF24 4LU, United Kingdom.

Journal of Biomedical Optics
|September 18, 2007
PubMed
Summary
This summary is machine-generated.

Three-dimensional ultrahigh-resolution optical coherence tomography (3D UHR OCT) offers new ways to assess glaucoma. A novel minimal distance parameter may provide more accurate markers of axonal damage than current methods.

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Area of Science:

  • Ophthalmology
  • Medical Imaging

Background:

  • Objective imaging of the optic nerve is crucial for glaucoma management.
  • There is a need for reliable objective precursors and markers for glaucoma diagnosis and staging.
  • Current methods like RNFL thickness and cup-to-disc ratio have limitations.

Purpose of the Study:

  • To explore the potential of 3D UHR OCT for analyzing retinal structure.
  • To develop and present a novel parameter for assessing axonal damage in glaucoma.
  • To demonstrate the utility of integrated tomographic and volumetric data.

Main Methods:

  • Utilized three-dimensional ultrahigh-resolution frequency domain optical coherence tomography (3D UHR OCT).
  • Developed a novel parameter: the three-dimensional minimal distance.
  • Analyzed tomographic and volumetric data of the retinal nerve fiber layer (RNFL) and optic nerve head.
  • Presented pilot data from a normal subject and two glaucoma patients.

Main Results:

  • 3D UHR OCT enables volumetric assessment of intraretinal layers.
  • The novel minimal distance parameter serves as an optical correlate of true RNFL thickness.
  • Integrated analysis of 3D UHR OCT data provides more informative indices of axonal damage.

Conclusions:

  • 3D UHR OCT shows promise for glaucoma diagnosis and staging.
  • The novel minimal distance parameter may improve the assessment of glaucoma-related axonal damage.
  • Combined tomographic and volumetric analysis enhances diagnostic capabilities.