astigmatism, n.
(astigmatisms)
(astigmatisms)
(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
<noun.state>
astigmatism astigmia
lexical pointers
derivationally related form
(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
<noun.state>
astigmatism astigmia
lexical pointers
derivationally related form
lexical pointers
derivationally related form
semantic pointers
domain of synset (topic)
hypernym
hyponym