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The multifunctional choroid.

Debora L Nickla1, Josh Wallman

  • 1Department of Biosciences, New England College of Optometry, Boston, MA 02115, USA. nicklad@neco.edu

Progress in Retinal and Eye Research
|January 2, 2010
PubMed
Summary
This summary is machine-generated.

The choroid

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Area of Science:

  • Ophthalmology and Visual Science
  • Ocular Anatomy and Physiology
  • Retinal and Choroidal Biology

Background:

  • The choroid, a vascular layer, supplies the outer retina and possesses unique features like lacunae and smooth muscle cells.
  • Choroidal neurons, innervated by various systems, may control muscle function and modulate blood flow.
  • Choroidal functions include retinal oxygen supply, thermal regulation, and scleral growth modulation.

Purpose of the Study:

  • To investigate the multifaceted roles of the choroid beyond its vascular supply to the outer retina.
  • To explore the choroid's contribution to focusing, eye growth regulation, and the etiology of refractive errors like myopia and hyperopia.

Main Methods:

  • Observational analysis of choroidal structure and cellular components.
  • Functional studies examining choroidal thickness changes in response to optical stimuli (e.g., lenses).
  • Correlation analysis of choroidal thickness dynamics with scleral growth and extracellular matrix synthesis.

Main Results:

  • Choroidal lacunae exhibit significant volume changes, impacting choroidal thickness and potentially lymphatic drainage.
  • Choroidal smooth muscle and intrinsic neurons actively modulate choroidal thickness and blood flow.
  • Choroidal thickness changes are linked to dynamic focusing of the retina and play a role in regulating eye growth and scleral remodeling.

Conclusions:

  • The choroid is a dynamic structure with significant roles in visual optics and ocular development.
  • Choroidal thickness regulation is mechanistically linked to scleral macromolecule synthesis, influencing eye elongation.
  • Understanding choroidal function is crucial for comprehending the pathogenesis of refractive errors, including myopia and hyperopia.