ALL meanings of astigmatism
a·stig·ma·tism
A a - uncountable noun astigmatism If someone has astigmatism, the front of their eye has a slightly irregular shape, so they cannot see properly. 3
- noun astigmatism a defect of a lens resulting in the formation of distorted images; caused by the curvature of the lens being different in different planes 3
- noun astigmatism faulty vision resulting from defective curvature of the cornea or lens of the eye 3
- noun astigmatism an irregularity in the curvature of a lens, including the lens of the eye, so that light rays from an object do not meet in a single focal point, resulting in an indistinct or distorted image 3
- noun astigmatism distorted view or judgment, as because of bias 3
- noun astigmatism Optics. an aberration of a lens or other optical system in which the image of a point is spread out along the axis of the system. 2
- noun astigmatism Also called astigmia [uh-stig-mee-uh] /əˈstɪg mi ə/ (Show IPA). Ophthalmology. a refractive error of the eye in which parallel rays of light from an external source do not converge on a single focal point on the retina. 1
- noun astigmatism A defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus. 1
- noun astigmatism defective cornea 1
- noun astigmatism (optics) A defect of a lens such that light rays coming from a point do not meet at a focal point so that the image is blurred. 0
- noun astigmatism (pathology) A disorder of the vision, usually due to a misshapen cornea, such that light does not focus correctly on the retina causing a blurred image. 0