pupillud
Pupillud is a term that appears to be a portmanteau, combining "pupil" (referring to the part of the eye) and "lud" (potentially derived from "ludic," meaning playful or pertaining to games). However, "pupillud" is not a recognized or established term in scientific, medical, or common parlance. There is no scientific definition or documented phenomenon associated with this specific word.
In the context of ophthalmology, the pupil is the opening in the center of the iris that
If "pupillud" were to be interpreted, it might conceptually suggest a playful or perhaps experimental manipulation