Miosis
（重定向自Myosis）
Miosis or myosis, /maɪˈoʊ sɪs/, from Ancient Greek μύειν, mūein, "to close the eyes", is a term with various definitions, which generally include constriction of the pupil.
The opposite condition, mydriasis, is the dilation of the pupil. Anisocoria is the condition of one pupil being more dilated than the other.