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Related Concept Videos

Glaucoma: Overview01:25

Glaucoma: Overview

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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: Treatment01:28

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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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Open Angle Glaucoma: Treatment01:27

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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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Increased Intracranial Pressure ll: Pathophysiology01:29

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Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins...
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Related Experiment Video

Updated: Apr 21, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
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Progression of Normal-Tension Glaucoma After Ventriculoperitoneal Shunt to Decrease Cerebrospinal Fluid Pressure.

Brian H Chen1, Mitchell D Drucker, Kenneth M Louis

  • 1*Department of Ophthalmology, Morsani College of Medicine, University of South Florida Eye Institute †Department of Neurosurgery, Morsani College of Medicine, University of South Florida, Tampa, FL.

Journal of Glaucoma
|October 29, 2014
PubMed
Summary
This summary is machine-generated.

Low cerebrospinal fluid pressure (CSFP) may worsen normal-tension glaucoma. This case study shows visual field loss and optic disc hemorrhages after shunt placement to reduce CSFP.

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Area of Science:

  • Ophthalmology
  • Neurosurgery
  • Neurology

Background:

  • Normal-tension glaucoma (NTG) is a progressive optic neuropathy.
  • Ventriculoperitoneal (VP) shunts are used to manage conditions like normal pressure hydrocephalus by lowering cerebrospinal fluid pressure (CSFP).

Observation:

  • A 93-year-old woman with NTG developed worsening visual fields and optic disc hemorrhages after VP shunt placement.
  • Reprogramming the shunt to further lower CSFP led to recurrent visual deterioration and new hemorrhages.
  • Increasing CSFP by reprogramming the shunt appeared to stabilize the condition.

Findings:

  • Lowering CSFP via VP shunt placement was temporally associated with worsening NTG.
  • Optic disc hemorrhages occurred in conjunction with reduced CSFP levels.
  • Elevating CSFP seemed to halt the progression of visual field loss.

Implications:

  • This case suggests that excessively low CSFP can be a contributing factor to the progression of normal-tension glaucoma.
  • The translaminar pressure gradient across the optic nerve may be a key mechanism.
  • Further research is warranted to understand the relationship between CSFP and glaucoma progression.