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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