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astigmatism

美[ə'stɪɡmətɪzəm] 英[ə'stɪɡmətɪzəm]

n. 散光

形容词：astigmatic 副词：astigmatically

近义词：astigmia，stigmatism，

Noun

(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point

用作名词(n.)

They have what is called astigmatism.他们有所谓散光。
Astigmatic dials are targets used for the detection and correction of astigmatism.散光盘是用于辅助检测并矫正散光的视标。

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