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



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

Definition of Astigmia

1. a visual defect [n -S]

Medical Definition of Astigmia

1. A visual disturbance caused by an error in the refraction of light within the eye. (27 Sep 1997)

Astigmia Pictures

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Lexicographical Neighbors of Astigmia

asthmatick
asthmatics
asthmogenic
asthore
asthores
astigmatic
astigmatic dial
astigmatic lens
astigmatics
astigmatism
astigmatism against the rule
astigmatism of oblique pencils
astigmatism with the rule
astigmatisms
astigmatometry
astigmia (current term)
astigmias
astika
astilbe
astilbes
astipulate
astipulated
astipulates
astipulating
astipulation
astipulations
astir
astir(p)
astochastic
astomatal

Literary usage of Astigmia

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Refractive and Motor Mechanism of the Eye by William Norwood Souter (1910)
"The latter arises from irregularity or uneven- ness of surface, or from heterogeneity of structure. Our attention is here confined to regular astigmia, ..."

2. Refraction, Including Muscle Imbalance and the Adjustment of Glasses by Royal Samuel Copeland, Adolph Ernest Ibershoff (1906)
"astigmia is usually congenital and frequently associated with other defects ... astigmia may also be caused by an oblique position of the lens of the eye, ..."

3. Ophthalmic review (1897)
"(7) When the corneal astigmia is oblique and of low degree, the meridian of greatest refraction of the whole eye commonly inclines more towards the ..."

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