(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
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用作名詞(n.)
The past rectification operation aiming at myopia refraction patients has developed the rectification treatment aiming at hyperopia and astigmia patients. 過去僅針對近視屈光患者施行的矯正手術，目前已發展出可針對遠視與散光患者施行的矯正治療。