astigmatism

English

Etymology

From a- (“not”) + stem of Ancient Greek στίγμα (stigma, “mark, point”) +‎ -ism

Noun

astigmatism (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

Greek: αστιγματισμός (el) (astigmatismós) Italian: astigmatismo (it) m.

Russian: астигматизм (ru) (astigmatízm) m. Spanish: astigmatismo (es) m.

disorder of the vision

Czech: astigmatismus (cs) m. French: astigmatisme (fr) m. Greek: αστιγματισμός (el) (astigmatismós) m.

Italian: astigmatismo (it) m. Russian: астигматизм (ru) (astigmatízm) m. Spanish: astigmatismo (es) m.

The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.

Translations to be checked

German: Astigmatismus m.

Japanese: 乱視 (ranshi)

See also

• Astigmatism on Wikipedia.Wikipedia
• emmetropia
• hyperopia
• myopia