Objective: The aim of this paper is to review existing literature on the subject and to report on and discuss a case of Marcus Gunn Phenomenon.
Description: A five year-old female, otherwise a healthy patient, while still a few months old, was seen by a pediatrician who detected a disorder of the right eye, initially believed to be strabismus, at a follow-up childcare consultation. Several ophthalmologists failed to establish a precise diagnosis.