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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...
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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.
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Related Experiment Video

Updated: Apr 18, 2026

Ultrasound Cyclo Plasty in Eyes with Glaucoma
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Surgical interventions for primary congenital glaucoma.

Deepta Ghate1, Xue Wang

  • 1Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, 985540 Nebraska Medical Center, Omaha, Nebraska, USA, 68198-5540.

The Cochrane Database of Systematic Reviews
|January 31, 2015
PubMed
Summary

Limited studies on pediatric glaucoma surgeries show no clear winner. More research is needed to determine the most effective surgical techniques for primary congenital glaucoma (PCG) and intraocular pressure (IOP) reduction.

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Area of Science:

  • Ophthalmology
  • Pediatric Surgery
  • Glaucoma Research

Background:

  • Primary congenital glaucoma (PCG) is a rare condition affecting infants, causing significant morbidity.
  • While various surgical techniques exist to lower intraocular pressure (IOP) in PCG, their comparative effectiveness is unclear.

Purpose of the Study:

  • To systematically review and compare the effectiveness and safety of different surgical interventions for primary congenital glaucoma (PCG).

Main Methods:

  • Searched multiple databases (CENTRAL, MEDLINE, EMBASE, PubMed, mRCT, ClinicalTrials.gov, ICTRP) without date or language restrictions.
  • Included randomized and quasi-randomized trials comparing surgical techniques in children under five years with PCG.
  • Assessed study quality and risk of bias using Cochrane Collaboration standards.

Main Results:

  • Six trials (102 eyes) were included, but no meta-analysis was possible due to diverse interventions.
  • No trial reported significant differences in IOP change or surgical success between surgical techniques.
  • Limited sample sizes and poor study design/reporting hinder definitive conclusions on efficacy and safety.

Conclusions:

  • Current evidence is insufficient to determine the most effective surgical approach for PCG.
  • Further high-quality research with robust methodologies is essential to guide clinical practice for pediatric glaucoma surgery.