• WordNet 3.6
    • n astigmia (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
    • n astigmia (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
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Century Dictionary and Cyclopedia
    • n astigmia Same as astigmatism.
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