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Related Concept Videos

Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
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...
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...
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...
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...

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Related Experiment Video

Updated: Jun 25, 2026

Modeling Cataract Surgery in Mice
05:19

Modeling Cataract Surgery in Mice

Published on: December 1, 2023

[Cataracts - trend and new developments].

Jörg Stürmer1

  • 1Augenklinik, Kantonsspital Winterthur. joerg.stuermer@ksw.ch

Therapeutische Umschau. Revue Therapeutique
|March 7, 2009
PubMed
Summary

Cataract surgery is the most common procedure in industrialized nations, effectively treating age-related vision loss. Modern techniques offer safe and efficient treatment for millions affected by cataracts worldwide.

Area of Science:

  • Ophthalmology
  • Gerontology

Context:

  • Cataracts are the primary cause of global blindness, affecting 20 million people.
  • Age-related cataracts are the most prevalent form, necessitating surgical intervention.

Purpose:

  • To outline the current standard of care for cataract treatment.
  • To highlight advancements in intraocular lens technology.

Summary:

  • Cataract surgery, typically phacoemulsification with intraocular lens implantation, is a frequent outpatient procedure.
  • Complications are rare, but potential for permanent visual disability exists.
  • Innovations focus on artificial lens design, including blue-blocking, multifocal, and toric options.

Impact:

  • Provides a safe and effective solution for vision impairment caused by cataracts.

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Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract
13:56

Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract

Published on: November 28, 2012

Related Experiment Videos

Last Updated: Jun 25, 2026

Modeling Cataract Surgery in Mice
05:19

Modeling Cataract Surgery in Mice

Published on: December 1, 2023

Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract
13:56

Characterization of Molecular Mechanisms of In vivo UVR Induced Cataract

Published on: November 28, 2012

  • Surgical advancements improve patient outcomes and visual rehabilitation.
  • New lens technologies offer personalized vision correction beyond basic sight restoration.