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Related Concept Videos

Glaucoma: Overview01:25

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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...
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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 14, 2026

Translaminar Autonomous System Model for the Modulation of Intraocular and Intracranial Pressure in Human Donor Posterior Segments
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[Is increased choroidal thickness a risk factor for primary angle-closure glaucoma].

Xiulan Zhang1, Wenbin Huang1

  • 1Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-sen University, Guangzhou 510060, China.

[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology
|April 25, 2015
PubMed
Summary
This summary is machine-generated.

Primary angle-closure glaucoma (PACG) involves anatomical issues and potentially thicker choroids. New OCT technology allows accurate measurement, suggesting increased choroidal thickness as a risk factor for PACG.

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Anatomic Pathology

Background:

  • Primary angle-closure glaucoma (PACG) is the predominant form of glaucoma in China.
  • The precise pathological mechanisms underlying PACG remain incompletely understood.
  • Established risk factors include anatomical traits like shallow anterior chamber depth and thick crystalline lenses.

Purpose of the Study:

  • To investigate the role of choroidal thickness as a potential risk factor in PACG.
  • To leverage advanced OCT technologies for accurate choroidal measurements.

Main Methods:

  • Utilizing enhanced depth imaging spectral-domain optical coherence tomography (EDI-OCT) and swept source OCT (SS-OCT).
  • Accurate measurement of choroidal thickness in PACG patients.

Main Results:

  • Studies indicate that eyes with PACG exhibit thicker choroids compared to those with primary open-angle glaucoma (POAG) and normal subjects.
  • This finding suggests a correlation between increased choroidal thickness and PACG.

Conclusions:

  • Increased choroidal thickness is identified as a potential contributing factor to PACG.
  • Advanced OCT imaging provides valuable insights into the pathophysiology of PACG.