- Also called a·stig·mi·a [uh-stig-mee-uh] /əˈstɪg mi ə/. 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.
- 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.
Origin of astigmatism
Examples from the Web for astigmatism
Historical Examples of astigmatism
If you don't just see things as they see them, you're troubled with astigmatism.The Trail of '98
Robert W. Service
You must see some good oculist about your astigmatism, my dear.A Book of Burlesques
H. L. Mencken
To her it was as though her own eyesight were normal, and astigmatism the rule among other people.Athalie
Robert W. Chambers
To such let me explain that I am suffering from astigmatism.Humorous Ghost Stories
A diagram similar to Fig. 394 is used as a test for astigmatism.Physics
Willis Eugene Tower
- a defect of a lens resulting in the formation of distorted images; caused by the curvature of the lens being different in different planes
- faulty vision resulting from defective curvature of the cornea or lens of the eye
- A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focusing clearly at one point on the retina, resulting in blurred vision.astigmia
- A visual defect in which the unequal curvature of one or more refractive surfaces of the eye, usually the cornea, prevents light rays from focusing clearly at a single point on the retina, resulting in blurred vision.