Meanings
plural astigmias
- dateduncountableusuallyastigmatism
Regular astigmia must be considered congenital, as a rule.
1910, John Elmer Weeks, A Treatise on Diseases of the Eye, page 6483 more examples
[…] and the measurement and correction of astigmia is one of the chief functions of the optometrist.
1925, Elmer LeRoy Ryer, “General Principles” (chapter 1), in Ophthalmometry, Optical Publishing Company, page 3Astigmia of the whole eye […] is the resultant of the special astigmia of all four refracting surfaces, […]
1897, American Journal of Ophthalmology, page 312When the corneal astigmia is direct, and about 0.75 D., we may expect to find an almost total absence of astigmia by subjective examination.
1898, Ophthalmic record, page 604
Synonyms & antonyms
noun(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
noun(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
- Ancient Greekστίγμα“mark, point”
- Englishastigmia
From a- (negative prefix) + Ancient Greek στίγμα (stígma, “mark, point”) + -ia.
More words from Ancient Greek
Full word history & related roots →Cite this entry
astigmia. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/astigmia
“astigmia.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/astigmia. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “astigmia,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/astigmia.
Source: astigmia on Wiktionary, CC BY-SA 4.0.