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Related Concept Videos

Diabetic Retinopathy01:27

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
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...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...
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...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...

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Related Experiment Video

Updated: May 11, 2026

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
10:14

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration

Published on: May 26, 2023

Drug-induced macular edema.

Olga E Makri1, Ilias Georgalas, Constantine D Georgakopoulos

  • 1Department of Ophthalmology, Medical School, University of Patras, Rio, 26504 Patras, Greece.

Drugs
|May 4, 2013
PubMed
Summary

Macular edema, a cause of vision loss, can be triggered by various systemic and ocular conditions, including diabetes. Certain medications, both oral and ophthalmic, are also identified as potential causes, necessitating careful consideration by clinicians.

Area of Science:

  • Ophthalmology
  • Pharmacology

Background:

  • Macular edema is a significant cause of vision loss, impacting patient quality of life.
  • It results from various systemic diseases (e.g., diabetes mellitus) and intraocular conditions.
  • Drug-induced macular edema is an increasingly recognized adverse event.

Purpose of the Study:

  • To provide an overview of drug-induced macular edema.
  • To discuss available evidence and pathophysiologic mechanisms.
  • To propose potential therapeutic strategies.

Main Methods:

  • Literature review of systemic and ophthalmic medications implicated in macular edema.
  • Analysis of reported cases and potential pathophysiologic pathways.

Main Results:

Related Experiment Videos

Last Updated: May 11, 2026

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
10:14

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration

Published on: May 26, 2023

  • Systemic drugs like thiazolidinediones, fingolimod, tamoxifen, taxanes, niacin, and interferons can cause macular edema.
  • Ophthalmic agents including prostaglandin analogs, epinephrine, timolol, and preservatives are also implicated.
  • Macular edema is a multifactorial condition with diverse etiologies.

Conclusions:

  • Drug-induced macular edema is a critical consideration in ophthalmology and other clinical fields.
  • Understanding the mechanisms is key to managing this condition.
  • Further research into therapeutic strategies is warranted.