astigmatism | ||
1. | [ noun ] (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea | |
Synonyms: | astigmia | |
Related terms: | ametropia keratoconus keratectasia ophthalmology | |
2. | [ noun ] (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point | |
Synonyms: | astigmia | |
Related terms: | stigmatism condition optics | |
Similar spelling: |
astigmatic astigmia |