astigmatism
英
[ə'stɪɡmətɪzəm]
美
[ə'stɪɡmətɪzəm]
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Noun:
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(ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
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(optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point
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用作名词 (n.)
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They have what is called astigmatism.
他们有所谓散光。
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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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