Lexic.us

Definition of Astigmia

1. Noun. (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people.

2. Noun. (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point.

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)

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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