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Widespread choroidal insufficiency in primary open-angle glaucoma

Z Q Yin1, Vaegan, T J Millar

  • 1School of Optometry, University of New South Wales, Kensington, Australia.

Journal of Glaucoma
|February 1, 1997
PubMed
Summary
This summary is machine-generated.

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Glaucoma patients exhibit thinner choroids due to loss of inner vessels, impacting choroidal perfusion. This finding, observed in primary open-angle glaucoma, was confirmed using histological and angiographic methods.

Area of Science:

  • Ophthalmology
  • Glaucoma Research
  • Vascular Biology

Background:

  • Glaucoma is a leading cause of irreversible blindness.
  • Choroidal blood flow alterations are implicated in glaucoma pathogenesis.
  • Understanding choroidal changes is crucial for glaucoma diagnosis and treatment.

Purpose of the Study:

  • To investigate choroidal perfusion in primary open-angle glaucoma (POAG).
  • To utilize histological and angiographic techniques to assess choroidal vasculature.
  • To compare choroidal characteristics between glaucoma, optic atrophy, and normal eyes.

Main Methods:

  • Examined choroidal vasculature in clinicopathological slides from 25 POAG, 5 optic atrophy, and 18 normal eyes.
  • Measured choroidal thickness and vessel dimensions using light microscopy and image analysis.

Related Experiment Videos

  • Compared fluorescein angiographic measures, including peak choroidal filling time, in 78 glaucoma and 84 normal eyes.

    • Main Results:

    • Choroids were significantly thinner (approx. 50 microns) in glaucoma patients compared to normal or optic atrophy eyes.
    • Vessel frequency and diameter decreased most notably near the choriocapillaris in glaucoma.
    • Peak choroidal filling time was significantly delayed in glaucoma patients, independent of age.

    Conclusions:

    • Reduced choroidal thickness in POAG is primarily attributed to the loss of innermost choroidal vessels.
    • Glaucoma-associated choroidal changes involve size decrease without significant flattening.
    • These distinct choroidal changes in POAG correlate with delayed perfusion observed in angiography and are not present in optic atrophy alone.