Noun: miosis (mioses) mI'ow-sis
- Reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller
"The ophthalmologist checked the patient's miosis";
- light reflex, pupillary reflex, myosis
Derived forms: mioses
Type of: inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex
Encyclopedia: Miosis, congenital