miotic

This term is used exclusively within medical and pharmacological contexts, specifically in ophthalmology. It describes a substance or effect that results in miosis, the constriction of the pupil. It is the direct antonym of mydriatic, which refers to agents that dilate the pupil.

Because it is a technical descriptor for a physiological action, it is almost always paired with nouns such as agent, drug, or effect. It is not used in casual conversation or general descriptions of the eye unless referring to a specific clinical condition or treatment.