Canadian Medical Guide > Diseases > Eye Diseases > Refractive Errors > Astigmatism Terms and Definitions




Astigmatism

Medical Definition: Unequal curvature of the refractive surfaces of the eye. Thus a point source of light cannot be brought to a point focus on the retina but is spread over a more or less diffuse area. This results from the radius of curvature in one plane being longer or shorter than the radius at right angles to it. (Dorland, 27th ed)
Guide Notes: refractive error

Astigmatism Medical Definitions and Terms

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