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Definition of Astigmia
1. Noun. (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people.
Exact synonyms: Astigmatism
Category relationships: Ophthalmology
Generic synonyms: Ametropia
Specialized synonyms: Keratectasia, Keratoconus
Derivative terms: Astigmatic, Astigmatic
Category relationships: Ophthalmology
Generic synonyms: Ametropia
Specialized synonyms: Keratectasia, Keratoconus
Derivative terms: Astigmatic, Astigmatic
2. Noun. (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point.
Exact synonyms: Astigmatism
Category relationships: Optics
Generic synonyms: Condition, Status
Derivative terms: Astigmatic, Astigmatic
Antonyms: Stigmatism
Category relationships: Optics
Generic synonyms: Condition, Status
Derivative terms: Astigmatic, Astigmatic
Antonyms: Stigmatism
Definition of Astigmia
1. a visual defect [n -S]
Medical Definition of Astigmia
1.