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Related Concept Videos

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...
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...
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 2, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
05:46

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile

Published on: September 20, 2024

Refractive surgery and the glaucoma patient.

Anurag Shrivastava1, Assumpta Madu, Jeffrey Schultz

  • 1Department of Ophthalmology, Glaucoma Service Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York 10467, USA. ashrivas@montefiore.org

Current Opinion in Ophthalmology
|May 10, 2011
PubMed
Summary

Glaucoma patients undergoing laser refractive surgery require updated protocols. New diagnostic tools can improve intraocular pressure (IOP) measurement and optic nerve assessment post-surgery.

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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

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Last Updated: Jun 2, 2026

Correction of Presbyopia by Monocular Bi-Aspheric Ablation Profile
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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
05:14

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

Area of Science:

  • Ophthalmology
  • Ophthalmic Surgery

Background:

  • Current preoperative testing for refractive surgery may not adequately address glaucoma management.
  • Glaucoma patients present unique challenges for laser ablative surgery.

Purpose of the Study:

  • To review diagnostic and management challenges for glaucoma patients undergoing laser ablative surgery.
  • To recommend improvements for perioperative protocols in this patient group.

Main Methods:

  • Literature review of diagnostic and management strategies.
  • Analysis of new diagnostic modalities for intraocular pressure (IOP) and optic nerve assessment.

Main Results:

  • Laser-assisted in-situ keratomileusis (LASIK) alters corneal structure, rendering Goldmann applanation tonometry inaccurate.
  • New diagnostic methods are being developed to accurately measure postoperative IOP and detect subtle optic nerve damage.

Conclusions:

  • Traditional diagnostic and treatment algorithms may be unsuitable for refractive surgery patients with glaucoma.
  • Glaucoma is a relative contraindication for refractive surgery, but improved diagnostics may enhance patient management.
  • Standardized recommendations are needed for long-term care of glaucoma patients undergoing refractive procedures.