Definition and Synonyms for Astigmatism

Definition of Astigmatism

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

astigmatic
Adjective
derivation
2
1. of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images
2. of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images
stigmatism
Noun
antonym
1
1. (optics) condition of an optical system (as a lens) in which light rays from a single point converge in a single focal point

Etymology for astigmatism