A gentle guide to sleep science support: Baby Sleeping with Eyes Open? What"s Behind This Quirky Habit

Baby Sleeping with Eyes Open? What's Behind This Quirky Habit Seeing your baby sleep with their eyes a little open can be surprising, even a little eerie the first time. The good news is that in most cases this is a harmless and fairly common infant behavior. This article explains what causes it, when to worry, and gentle steps you can take to help your baby be comfortable and safe. What does sleeping with eyes open look like? Babies who sleep with their eyes open may show anything from a faint slit of eyelid to a noticeably open eye. Sometimes only one eye is affected, and sometimes both. You might notice eyelid fluttering, brief eye movements, or a glassy look rather than a fully closed eyelid. It is most common during naps and nighttime sleep in newborns and young infants. The open-eye behavior can be intermittent and short lived, or it may persist across many sleep cycles for a few weeks. Often it is most obvious while the baby is in light or active sleep, but it can show up outside of those phases too. Why babies sometimes sleep with eyes open Infant sleep is different from adult sleep. Newborns spend a large portion of sleep time in active sleep, the developmental equivalent of REM sleep. During active sleep babies display rapid eye movements and more irregular breathing and muscle activity. Because sleep systems are still maturing, eyelid control can be incomplete, and a baby may rest with their eyes partially open. Another common reason is simple immaturity of eyelid reflexes. In the first weeks and months after birth, the muscles and nerves that close the eyelids are still developing. Preterm infants are especially likely to show this. In many infants the eyelids gradually come to close more reliably as their nervous system develops. Other causes to consider Most of the time the behavior is benign, but there are other less common reasons a baby might sleep with eyes open. Temporary eyelid swelling or infection can prevent full closure. Facial nerve palsy, which can result from birth-related pressure or rare medical issues, may weaken the eyelid muscles on one side. Structural conditions of the eyelid or orbit can also play a role. Neurologic conditions, including seizure disorders, sometimes involve abnormal eye opening or eye movements during sleep. If the eye-opening is repetitive, accompanied by stiffening movements, or occurs with other concerning signs such as poor feeding or abnormal tone, medical evaluation is important to rule out neurologic causes. When to be reassured and when to contact your pediatrician Many parents can be reassured when the baby is otherwise well, feeding normally, gaining weight, and meeting expected developmental milestones. Brief episodes of partial eye opening that occur only during sleep, with no redness, discharge, or irritation, are usually just a stage of maturation. Contact your pediatrician if any of the following apply: the eyes look red, crusty, or irritated; there is persistent drainage; the eye