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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...

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Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
07:11

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Published on: May 25, 2020

Visual field progression differences between normal-tension and exfoliative high-tension glaucoma.

Kristy G Ahrlich1, Carlos Gustavo V De Moraes, Christopher C Teng

  • 1New York University School of Medicine, New York, New York, USA.

Investigative Ophthalmology & Visual Science
|January 1, 2010
PubMed
Summary

Exfoliative high-tension glaucoma (XHTG) and normal-tension glaucoma (NTG) show similar global visual field progression rates when adjusted for key factors. However, NTG more frequently affects central vision, necessitating specific monitoring.

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Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Visual Field Analysis

Background:

  • Glaucoma encompasses various types, including normal-tension glaucoma (NTG) and exfoliative high-tension glaucoma (XHTG).
  • Understanding the distinct progression patterns of these glaucoma subtypes is crucial for effective patient management and visual field preservation.

Purpose of the Study:

  • To compare the pattern, location, and rate of visual field (VF) change between NTG and XHTG.
  • To identify factors influencing glaucoma progression in different subtypes.

Main Methods:

  • Retrospective review of patients from the New York Glaucoma Progression Study with at least five VF tests.
  • Categorization into NTG (intraocular pressure [IOP] < 21 mm Hg) and XHTG (IOP ≥ 21 mm Hg) groups.
  • Automated pointwise linear regression analysis to determine global and localized VF change rates.

Main Results:

  • XHTG patients were older with higher mean IOP and central corneal thickness (CCT) than NTG patients.
  • XHTG showed a faster global progression rate, but this difference became non-significant after adjusting for age, IOP, and CCT.
  • NTG eyes were more likely to exhibit progression in the paracentral visual field, independent of other factors.

Conclusions:

  • Global VF progression rates are comparable between XHTG and NTG after adjusting for IOP, CCT, and age.
  • NTG is independently associated with a higher likelihood of paracentral VF progression.
  • Ophthalmological surveillance for open-angle glaucoma with normal IOP should include regular central visual field assessments.