astigmatism
IPA: ʌstˈɪgmʌtɪzʌm
noun
- (optics) 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.
- (pathology) 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.
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Examples of "astigmatism" in Sentences
- Of course, I have an astigmatism.
- He is nearsighted and suffers from astigmatism.
- Arcuate keratotomy is used to correct astigmatism.
- Against the rule astigmatism reverses the situation.
- Accurate keratotomy is still popular to correct astigmatism.
- Astigmatism can be corrected with a pair of cylindrical lenses.
- This optical shape gives rise to regular astigmatism in the eye.
- Javal's rule can then be used to compute the estimate of astigmatism.
- A large chalazion can cause astigmatism due to pressure on the cornea.
- In the human eye, a cylindrical error will result in on axis astigmatism.