这个词是什么意思？
Constriction of the pupil in response to light stimulation of the retina. It refers also to any reflex involving the iris, with resultant alteration of the diameter of the pupil. (Cline et al., Dictionary of Visual Science, 4th ed)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D012025 · MeSH 2026。
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