1. n. a drug that causes the pupil of the eye to contract by constricting the ciliary muscle (see ciliary body). Miotics, such as *pilocarpine, are used to reduce the pressure in the eye in the treatment of glaucoma: contraction of the ciliary muscle increases the angle between the iris and cornea through which aqueous humour drains from the eye. 2. adj. showing *miosis.
Health Encyclopedia