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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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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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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
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Correlation between optic nerve head structural parameters and glaucomatous visual field indices.

Kyoichi Mizumoto1, Masahiko Gosho2, Masahiro Zako1

  • 1Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan.

Clinical Ophthalmology (Auckland, N.Z.)
|July 17, 2014
PubMed
Summary
This summary is machine-generated.

Bruch's membrane opening-minimum rim width (BMO-MRW) best predicts visual field indices in glaucoma patients. While retinal nerve fiber layer thickness (RNFL-T) and BMO-MRW volumes show strong correlations, BMO-MRW is identified as the superior predictor.

Keywords:
Bruch’s membrane opening-minimum rim widthglaucomaretinal nerve fiber layer thicknessrim areaspectral domain optical coherence tomographyvisual field

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Medical Imaging

Background:

  • Glaucoma is a leading cause of irreversible blindness.
  • Optic nerve head (ONH) structural parameters are crucial for glaucoma diagnosis and monitoring.
  • Understanding the relationship between ONH structure and visual field defects is vital for patient management.

Purpose of the Study:

  • To investigate the associations between key optic nerve head structural parameters and glaucomatous visual field indices.
  • To determine which ONH structural parameter is the best predictor of visual field sensitivity and deviation.
  • To compare the predictive power of retinal nerve fiber layer thickness (RNFL-T) and Bruch's membrane opening-minimum rim width (BMO-MRW) and their volumes.

Main Methods:

  • Retrospective analysis of 57 eyes from 33 glaucoma patients.
  • Visual field assessment using Humphrey field analyzer.
  • Optic nerve head parameters (RNFL-T, BMO-MRW, rim area) measured via spectral domain optical coherence tomography and 3D photography.
  • Spearman's rank correlation and Akaike information criterion used for statistical analysis.

Main Results:

  • Bruch's membrane opening-minimum rim width (BMO-MRW) showed the strongest correlation with visual field total deviation (0.33) and threshold of visual sensitivity (0.32).
  • Retinal nerve fiber layer thickness (RNFL-T) volume (0.36) and BMO-MRW volume (0.37) demonstrated stronger correlations with total deviation compared to BMO-MRW alone.
  • Akaike information criterion indicated BMO-MRW as the best predictor for both visual field indices.

Conclusions:

  • Bruch's membrane opening-minimum rim width (BMO-MRW) is a significant predictor of glaucomatous visual field defects.
  • While RNFL-T and BMO-MRW volumes correlate strongly with visual field indices, BMO-MRW itself emerges as the most robust predictor.
  • These findings underscore the importance of BMO-MRW in assessing glaucoma severity and progression.