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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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Related Experiment Video

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Doppler Optical Coherence Tomography of Retinal Circulation
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Normal-Tension Glaucoma Masqueraders: Detection Using Optical Coherence Tomography.

Debbie S Kuo1, Sanjay Asrani

  • 1*Duke Eye Center, Duke University, Durham, NC †Palo Alto Medical Foundation, Palo Alto, CA.

Journal of Glaucoma
|January 26, 2017
PubMed
Summary
This summary is machine-generated.

Optical coherence tomography (OCT) aids in distinguishing glaucoma from mimics. Spectral-domain OCT findings in four patients revealed retinal diseases or optic neuropathies, not glaucoma.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Neurology

Background:

  • Optical coherence tomography (OCT) is crucial for glaucoma diagnosis and management.
  • OCT findings can overlap between glaucoma and other optic nerve conditions.
  • Differentiating glaucoma from mimics is essential for accurate patient care.

Observation:

  • A case series of four adult patients evaluated for suspected normal-tension glaucoma was reviewed.
  • Patients presented with spectral-domain OCT findings suggestive of conditions other than glaucoma.
  • Clinical data included history, examination, visual fields, and OCT imaging.

Findings:

  • Case 1: Diffuse retinal nerve fiber layer (RNFL) and macular thinning on OCT due to cancer-associated retinopathy.
  • Case 2: Focal RNFL loss and macular thinning on OCT after branch retinal artery occlusion.
  • Case 3 & 4: Global and segmental RNFL/macular thinning on OCT due to optic nerve hypoplasia.

Implications:

  • Spectral-domain OCT, in conjunction with clinical context, can differentiate glaucoma from non-glaucomatous optic neuropathies.
  • Accurate OCT interpretation is vital for diagnosing glaucoma masqueraders.
  • This case series highlights the importance of considering differential diagnoses in suspected glaucoma cases.