astigmatism has definitions from the fields of ophthalmology,optics,medicine
1
[ noun ] (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea

Synonyms

astigmia

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

*