pupillo-, pupill- +
(Latin: [diminutive of pupa, a young girl, doll or puppets] the pupil of the eye; including the larva of insects)
The term pupil came into existence because when one looked closely into another person's eyes, he/she could see the reflections of little images ["dolls" or "puppets"] of her/himself.
2. Relating to the autonomic nerve fibers that supplly the smooth muscle of the iris.
Usually a unilateral condition of the eye in which the affected pupil is larger than the other, responds to accommodation and convergence in a slow, delayed fashion, and reacts to light only after prolonged exposure to dark or light.
2. An instrument for measuring the distance between the centers of the pupils of the eyes.