| 单词 | astigmia |
| 释义 | astigmia (once / 37642 pages) n WORD FAMILY astigmia: astigmatic+/astigmatic: astigmatism 1n (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people Syn|Hypo|Hyper astigmatism keratectasia abnormal bulging of the cornea of the eye keratoconusabnormal cone-shaped protrusion of the cornea of the eye; can be treated by epikeratophakia ametropia (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia 2n (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point Syn|Ant|Hyper astigmatism stigmatism (optics) condition of an optical system (as a lens) in which light rays from a single point converge in a single focal point condition, status a state at a particular time |
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