a drug that causes miosis (constriction of the pupil of the eye)
<noun.artifact> [ adj ]
of or relating to or causing constriction of the pupil of the eye
<adj.pert> a miotic drug
Myotic \My*ot"ic\, a. [See {Myosis}.] (Med.) Producing myosis, or contraction of the pupil of the eye, as opium, calabar bean, etc. -- n. A myotic agent.