(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point

• (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea
• Wine initially gives me intoxi­cation and sight issues

WordNet Word definitions in WordNet
n. (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea [syn: astigmatism ] (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point [syn: astigmatism ...

Wiktionary Word definitions in Wiktionary
n. astigmatism