astigmatism
/ษหstษชษกmษtษชzmฬฉ/IPA: /AH0 S T IH1 G M AH0 T IH0 Z AH0 M/
noun
- 1
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.
- 2
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.
Synonyms
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