Amblyopia

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Glossary Term:

  • Also known as a lazy eye
    • NB: the eye is not 'lazy' and does not necessarily have a motor defect (though squint can be a cause).


  • Poor vision in an eye which does not have a structural abnormality, or at least no structural abnormality on the same scale as the visual defect.
  • Due to a developmental problem in the brain:
    • poor transmission of the image from the eye to the brain during early life results in poor mapping of the visual image in the cortex ('abnormal occular dominance columns).
    • Organic structural defects can cause amblyopia, which remains after the defect is corrected.


  • Causes:
    • Strabismus
    • Anisometropia (refractive errors)
    • Vision deprivation
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