Definition of astigmatism in English:
A defect in the eye or in a lens caused by a deviation from spherical curvature, which results in distorted images, as light rays are prevented from meeting at a common focus.
- Whether myopia, hyperopia or astigmatism is present, surgical correction attempts to redirect light rays to accommodate the refractive error.
- Side vision is distorted and oblique rays of light passing through a spherical lens produce astigmatism.
- Apart from testing the eye, they supply booklets detailing eye care with particular reference to refractive errors such as myopia, hypermetropia and astigmatism.
- Example sentences
- The astigmatic person does not know which focal line to look at, and hunting between the two may cause eyestrain.
- Monet, on seeing those fields, described them as ‘enough to drive a poor painter crazy - impossible to render with our poor colors,’ but render them he did in his astigmatic but beautiful way.
- Ordinary soft lenses tend to mould to the astigmatic curve, but special toric soft lenses are available for astigmatism.
Definition of astigmatism in:
- US English dictionary
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