كتب astigmatism
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عرض المزيد
astigmatism (معلومة)
- astigmatism:- (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point (Princeton WordNet 3.1)
- astigmatism:- (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people (Princeton WordNet 3.1)
