Medical Dictionary

astigmatism

noun astig·ma·tism \ə-ˈstig-mə-ˌtiz-əm\

Medical Definition of ASTIGMATISM

1
:  a defect of an optical system (as a lens) causing rays from a point to fail to meet in a focal point resulting in a blurred and imperfect image
2
:  a defect of vision due to astigmatism of the refractive system of the eye and especially to corneal irregularity—compare emmetropia, myopia
April 19, 2015
desiccate Hear it
to dry up or become dried up
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