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Central retinal artery obstruction and visual acuity

G C Brown, L E Magargal

    Ophthalmology
    |January 1, 1982
    PubMed
    Summary
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    Acute central retinal arterial obstruction (CRAO) rarely presents with no light perception (NLP) vision. When NLP occurs, suspect additional factors like choroidal or optic nerve issues.

    Area of Science:

    • Ophthalmology
    • Retinal Vascular Diseases
    • Neuro-ophthalmology

    Background:

    • Acute central retinal arterial obstruction (CRAO) is a critical condition leading to vision loss.
    • Previous literature suggests a high incidence of no light perception (NLP) vision in CRAO patients upon presentation.
    • The diagnostic criteria and prognostic indicators for CRAO require further elucidation.

    Purpose of the Study:

    • To investigate the incidence and potential causes of no light perception (NLP) vision in patients with acute central retinal arterial obstruction (CRAO).
    • To determine if NLP vision in CRAO is solely due to central retinal artery occlusion or if other factors are involved.

    Main Methods:

    • Retrospective review of medical records for 72 patients (73 eyes) diagnosed with acute CRAO.

    Related Experiment Videos

  • Analysis of presenting visual acuity, including instances of NLP vision.
  • Correlation of NLP vision with findings from fluorescein angiography and electroretinography to identify concomitant pathologies.

    • Main Results:

    • Only 4% of CRAO cases presented with initial NLP vision.
    • Two of the three NLP cases exhibited posterior ciliary circulation defects.
    • The third NLP case demonstrated significant outer and inner retinal damage on electroretinography.

    Conclusions:

    • True no light perception (NLP) vision in acute central retinal arterial obstruction (CRAO) is uncommon when the occlusion is limited to the central retinal artery.
    • The presence of NLP vision in CRAO suggests the likelihood of complicating factors, such as choroidal circulation abnormalities or optic nerve damage.
    • Further investigation into associated vascular and neurological conditions is warranted in CRAO cases presenting with profound vision loss.