astigmia
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Noun | 1. | astigmia - (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people ophthalmology - the branch of medicine concerned with the eye and its diseases ametropia - (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia 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 |
2. | astigmia - (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point optics - the branch of physics that studies the physical properties of light |
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