astigmatism   (Sound)

The noun astigmatism has 2 senses

• astigmatism, astigmia -- ((ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people)


• astigmatism, astigmia -- ((optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point)