Is it ensure, insure, or assure?
miosis mi·o·sis or my·o·sis (mī-ō'sĭs)
n. pl. mi·o··ses (-sēz)
The period of decline of a disease in which the intensity of the symptoms begins to diminish.
Constriction of the pupil of the eye, resulting from a normal response to an increase in light or caused by certain drugs or pathological conditions.