noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   astigmatism dated, uncountable, usually

   "[…] and the measurement and correction of astigmia is one of the chief functions of the optometrist."

2. 2
   (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point wordnet
3. 3
   (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people wordnet

Synonyms

All synonyms

albinismastigmatismastigmatismblindness

Example

More examples

"[…] and the measurement and correction of astigmia is one of the chief functions of the optometrist."

Etymology

From a- (negative prefix) + Ancient Greek στίγμα (stígma, “mark, point”) + -ia.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.