Babies with intermittent tightly closed eyes may have visual fatigue, conjunctivitis, Tourette’s syndrome, optic neuropathy and other conditions. 1. Visual fatigue: If a child has visual fatigue, he will have intermittent tightly closed eyes, and the situation will improve after resting with eyes closed. 2. Conjunctivitis: when the pathogen infects the conjunctiva, it will cause eye discomfort, and the baby may have intermittent tightly closed eyes, in addition to the redness of the eyes, itchy and so on, you can choose erythromycin ointment under the guidance of the doctor. 3. Tourette’s syndrome: Tourette’s syndrome is a chronic neuropsychiatric disorder that involves involuntary muscle twitching in several parts of the body, and some patients, especially babies, may experience intermittent tight shutting of the eyes. 4. Optic neuropathy: Some children with optic neuropathy will have intermittent tight eye closure. Babies with intermittent tightly closed eyes should consult an ophthalmologist in time to identify the specific causes and actively treat them.