astigmatism

English

Etymology

From a- (negative prefix) + stem of Ancient Greek στίγμα (stígma, “mark, point”) + -ism. Coined by English polymath William Whewell in 1846.

Pronunciation

• IPA^(key): /əˈstɪɡmətɪzm̩/

Noun

astigmatism (countable and uncountable, plural astigmatisms)

1. (optics) A defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred.
2. (pathology) A disorder of the vision, usually due to a misshapen cornea, such that light does not focus correctly on the retina causing a blurred image.

Synonyms

• astigmia

Derived terms

• astigmatic
• astigmatically

Related terms

• stigma
• stigmatize

Translations

defect of a lens

• Arabic: اللَابُؤَارِيَّة f (al-lābuʔāriyya), اللَانُقَطِيَّة f (al-lānuqaṭiyya)

  Egyptian Arabic: استكماتزم m (estekmatezm)

• Chinese:

  Mandarin: 像散 (zh) (xiàngsàn)

• Danish: astigmatisme c
• Finnish: astigmaattisuus (fi)
• Greek: αστιγματισμός (el) m (astigmatismós)
• Indonesian: astigmatisme
• Irish: aistiogmatacht f
• Italian: astigmatismo (it) m
• Japanese: 非点収差 (ひてんしゅうさ, hiten shūsa)
• (deprecated template usage) {{trans-mid}}
• Malay: astigmatisme
• Norwegian:

  Bokmål: astigmatisme m

  Nynorsk: astigmatisme m

• Portuguese: astigmatismo (pt)
• Romanian: astigmatism (ro) n
• Russian: астигмати́зм (ru) m (astigmatízm)
• Spanish: astigmatismo (es) m
• Thai: สายตาเอียง (sǎai-dtaa-iiang)
• Turkish: astigmatizm (tr)

disorder of the vision

• Armenian: աստիգմատիզմ (hy) (astigmatizm)
• Catalan: astigmatisme m
• Chinese:

  Mandarin: 散光 (zh) (sǎnguāng), 亂視／乱视 (zh) (luànshì), 乱视 (zh) (luànshì)

• Czech: astigmatismus (cs) m
• Danish: astigmatisme c
• Finnish: hajataittoisuus (fi)
• French: astigmatisme (fr) m
• German: Astigmatismus m
• Greek: αστιγματισμός (el) m (astigmatismós)
• Irish: aistiogmatacht f
• Italian: astigmatismo (it) m
• (deprecated template usage) {{trans-mid}}
• Japanese: 乱視 (らんし, ranshi)
• Norwegian:

  Bokmål: astigmatisme m

  Nynorsk: astigmatisme m

• Polish: astygmatyzm m
• Romanian: astigmatism (ro) n
• Russian: астигмати́зм (ru) m (astigmatízm)
• Spanish: astigmatismo (es) m
• Thai: สายตาเอียง (sǎai-dtaa-iiang)
• Turkish: astigmatizm (tr)

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

Translations to be checked

• German: ^{(please verify)} Astigmatismus m
• (deprecated template usage) {{trans-mid}}

See also

• emmetropia
• hyperopia
• myopia

Further reading

• astigmatism on Wikipedia.Wikipedia