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Source: astigmatism - Definition from the Merriam-Webster Online Dictionary | www.merriam-webster.com
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Astigmatism is usually caused by an irregular-shaped cornea and is easily corrected by eyeglasses, contact lenses or surgery.
Astigmatism is a refractive error of the eye in which parallel rays of light from an external source do not converge on a MORE?
Stigmatism in optics means the property of a lens that is stigmatic. In pathology, a condition in which stigmata are present.
The state of a refracting or reflecting system in which light rays from a single point are accurately focused at another point.
