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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...
Ophthalmic Drug Delivery Systems01:23

Ophthalmic Drug Delivery Systems

Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...

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Related Experiment Video

Updated: May 18, 2026

Trabecular Meshwork Response to Pressure Elevation in the Living Human Eye
09:03

Trabecular Meshwork Response to Pressure Elevation in the Living Human Eye

Published on: June 20, 2015

Hemodynamic interactions in the eye: a review.

S Mojtaba Golzan1, Alberto Avolio, Stuart L Graham

  • 1Australian School of Advanced Medicine, Macquarie University, Sydney, NSW, Australia. mojtaba.golzan@mq.edu.au

Ophthalmologica. Journal International D'Ophtalmologie. International Journal of Ophthalmology. Zeitschrift Fur Augenheilkunde
|September 26, 2012
PubMed
Summary

Ocular hemodynamics, including retinal venous pulsatility, offer insights into systemic circulation and eye diseases like glaucoma. Measuring these parameters may improve clinical assessments for various conditions.

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Fluorescent Dye Labeling of Erythrocytes and Leukocytes for Studying the Flow Dynamics in Mouse Retinal Circulation
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Published on: July 3, 2017

Area of Science:

  • Ophthalmology
  • Neurology
  • Physiology

Background:

  • The eye's circulation reflects systemic health and is crucial for understanding ocular diseases like glaucoma.
  • Interactions between intraocular pressure, retinal vessels, and cerebrospinal fluid pressure are key research areas.
  • Understanding these physiological dynamics explains phenomena like retinal venous pulsatility and translaminar pressure gradients.

Purpose of the Study:

  • To review recent findings on ocular hemodynamics.
  • To highlight the relevance of ocular hemodynamic parameters in diagnosing ophthalmic and neurological diseases.

Main Methods:

  • Review of recent scientific literature on ocular hemodynamics.
  • Analysis of the relationship between intraocular pressure, retinal vessels, and cerebrospinal fluid pressure.
  • Investigation of spontaneous retinal venous pulsatility and translaminar pressure gradient.

Main Results:

  • Ocular circulation provides visible indicators of systemic circulatory status.
  • Retinal venous pulsatility and translaminar pressure gradient are influenced by the interplay of intraocular and cerebrospinal fluid pressures.
  • Measurable changes in venous pulsatility show potential for enhanced clinical assessment.

Conclusions:

  • Ocular hemodynamics are vital for both ophthalmic and neurological health assessment.
  • Further research into ocular hemodynamics can lead to improved diagnostic tools.
  • Understanding ocular hemodynamics aids in explaining and diagnosing various eye and neurological conditions.