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Related Concept Videos

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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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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Optic Disc - Fovea Angle: The Beijing Eye Study 2011.

Rahul A Jonas1,2, Ya Xing Wang1, Hua Yang1

  • 1Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Lab, Beijing, China.

Plos One
|November 7, 2015
PubMed
Summary

The optic disc-fovea angle, crucial in eye anatomy, influences retinal nerve fiber layer thickness patterns. This angle may aid in diagnosing glaucoma and understanding optic nerve diseases.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Medical Imaging

Background:

  • The optic disc-fovea angle is a key anatomical landmark in the posterior pole of the eye.
  • Understanding its variations and associations is vital for diagnosing and managing various ocular conditions.

Purpose of the Study:

  • To determine the optic disc-fovea angle in a population-based cohort.
  • To investigate the relationships between the optic disc-fovea angle and ocular and systemic parameters.

Main Methods:

  • A cross-sectional study of 3052 individuals (6043 eyes) from the Beijing Eye Study 2011.
  • Ophthalmic examinations and fundus photography were used to measure the optic disc-fovea angle.

Main Results:

  • The mean optic disc-fovea angle was 7.76 ± 3.63 degrees.
  • A larger angle was associated with older age, thinner superior RNFL, thicker inferior RNFL, retinal vein occlusion, and larger cylindrical refractive error.

Conclusions:

  • The optic disc-fovea angle significantly impacts retinal nerve fiber layer thickness distribution.
  • This angle may be a valuable parameter in glaucoma diagnosis and assessing structure-function relationships in optic nerve diseases.