Three-month-old babies’ eyes move involuntarily, the first consideration is a physiological phenomenon, and the second may be related to congenital genetic factors, eye lesions, neurological lesions and so on. 1. Physiological phenomenon: three-month-old baby’s eyes occasionally move involuntarily, may be related to the baby’s brain has not yet matured, there is no other discomfort, observation and follow-up can be. 2. Hereditary factors: If parents have a history of involuntary eye movement, it may lead to the baby’s involuntary movement, which makes the eyeballs swing horizontally and rotate without the control of the body. 3. Ocular lesions: when a three-month-old baby suffers from congenital cataract, amblyopia, extraocular muscle paralysis and other ocular diseases, it will easily lead to poor vision because of the difficulty in the formation of the gazing reflex and the phenomenon of involuntary eye movements. 4. Neurological lesions: If the three-month-old baby occurs brain trauma, encephalitis, cerebrovascular lesions and other diseases, may lead to the phenomenon of central involuntary eye movement, and is accompanied by dizziness, nausea, vomiting and other uncomfortable symptoms. Three-month-old baby’s eyes move involuntarily, repeated and persistent appearances can not be relieved, parents should immediately take the baby to the hospital, for relevant examinations, the doctor will give the correct treatment according to the results of the examination.