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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...
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...
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...
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

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Related Experiment Video

Updated: Jun 13, 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

[Glaucoma and cataract].

T H Klink1, M Müller, M Zierhut

  • 1Universitätsklinikum, Julius-Maximilians-Universität Würzburg, Josef-Schneider-Strasse 11, 97080, Würzburg, Deutschland. klink_t@klinik.uni-wuerzburg.de

Der Ophthalmologe : Zeitschrift Der Deutschen Ophthalmologischen Gesellschaft
|May 11, 2010
PubMed
Summary
This summary is machine-generated.

Combined cataract and glaucoma surgery is increasingly common. A staged approach, starting with cataract surgery, may reduce complications like filtering bleb scarring compared to traditional trabeculectomy.

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Area of Science:

  • Ophthalmology
  • Surgical Innovation

Context:

  • Increasing incidence of combined cataract and glaucoma due to population development.
  • Trabeculectomy remains a common procedure for combined glaucoma-cataract surgery.
  • Need for safer, more effective surgical strategies for coexisting conditions.

Purpose:

  • To compare the outcomes of different surgical approaches for combined cataract and glaucoma.
  • To evaluate the efficacy and safety of newer non-penetrating glaucoma procedures like canaloplasty.
  • To determine the optimal surgical sequence for managing both conditions.

Summary:

  • A two-step approach, beginning with cataract surgery, is preferred over immediate combined trabeculectomy to minimize risks such as filtering bleb scarring.
  • Combined trabeculectomy shows higher rates of postoperative fibrin exudation and complications than combined trabeculotomy or non-penetrating glaucoma surgery.
  • Canaloplasty, a novel non-penetrating procedure, demonstrates promising results, potentially offering lower intraocular pressure (IOP) when combined with cataract surgery, though long-term efficacy requires further study.
  • Chamber angle surgery combined with cataract surgery presents minimal complications, preserves conjunctiva, reduces medication needs, and delays more invasive procedures.

Impact:

  • Highlights the advantages of a staged surgical approach for combined cataract and glaucoma.
  • Introduces canaloplasty as a potentially safer alternative with promising IOP-lowering effects.
  • Suggests that chamber angle surgery combined with cataract surgery offers a low-risk option with significant benefits.