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Related Concept Videos

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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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Diagnosing glaucoma progression with optical coherence tomography.

Christopher Kai-Shun Leung1

  • 1Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, People's Republic of China.

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Optical coherence tomography (OCT) provides advanced imaging for glaucoma detection. New OCT analysis methods, including RNFL thickness maps and macular imaging, improve glaucoma progression monitoring.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Glaucoma Research

Background:

  • Optical coherence tomography (OCT) is increasingly used for glaucoma diagnosis and monitoring.
  • Spectral-domain OCT offers improved speed and resolution for evaluating retinal nerve fiber layer (RNFL) thinning and optic nerve head (ONH) remodeling.

Purpose of the Study:

  • To review recent advancements in OCT imaging for detecting and monitoring glaucoma progression.
  • To summarize progress in RNFL, ONH, and macular measurements using OCT.

Main Methods:

  • Review of recent studies utilizing OCT for glaucoma assessment.
  • Analysis of RNFL thickness maps, circumpapillary RNFL thickness profiles, lamina cribrosa displacement, and macular layer thickness.

Main Results:

  • RNFL thickness maps show higher sensitivity for detecting glaucoma progression than conventional profiles.
  • Lamina cribrosa displacement measurements correlate intraocular pressure with ONH remodeling.
  • Ganglion cell and inner plexiform layer analysis serves as an alternative for tracking glaucoma progression.

Conclusions:

  • OCT analysis of RNFL thickness maps, lamina cribrosa displacement, and inner macular thickness offers a new approach to evaluating glaucomatous damage and progression.