astigmia

Definitions of astigmia
  1. noun
    (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
    synonyms: astigmatism
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    types:
    keratectasia
    abnormal bulging of the cornea of the eye
    keratoconus
    abnormal cone-shaped protrusion of the cornea of the eye; can be treated by epikeratophakia
    type of:
    ametropia
    (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia
  2. noun
    (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
    synonyms: astigmatism
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    type of:
    condition, status
    a state at a particular time
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