英文英文字典
英文英文字典
古腾堡计划中的在线英语-英语词典
结果
Astigmatism的结果
Astigmatism
(n.)
A defect of the eye or of a lens, in consequence of
which the rays derived from one point are not brought to a single focal
point, thus causing imperfect images or indistinctness of vision.