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Understanding Why Your Baby Sleeps With One Eye Open

Parents often find themselves intrigued and sometimes worried by the fascinating sleep patterns of their newborns. One commonly asked question is, “Why does my baby sleep with one eye open?” If you’ve noticed this phenomenon, you’re not alone. This article will explore why babies may sleep with one eye open, the implications, and when to seek professional help.

Understanding Why Babies Sleep With One Eye Open

Sleeping with one eye open, also known as nocturnal lagophthalmos, isn’t uncommon among newborns. But why does it happen?

The Immaturity of the Nervous System

Babies’ nervous systems are still developing, which can lead to unusual sleep behaviors, like sleeping with one eye open.

REM Sleep

During the rapid eye movement (REM) phase of sleep, your baby’s eyes may move under the lids and give the impression of being half open.

Eye Protection and Hydration

Sometimes, the eyelids don’t completely close to keep the eyes protected and hydrated.

What to Do if Your Baby Sleeps With One Eye Open

If you notice your baby frequently sleeping with one eye open, don’t panic. It’s usually harmless and resolves as your baby grows. However, if you notice any discomfort, redness, or dryness in your baby’s eye, consult a pediatrician.

Eye Behaviors in Baby’s Sleep

Why do some babies sleep with their eyes half open?

Various factors can cause babies to sleep with their eyes half open, including the immaturity of their nervous system or a stage of the REM sleep cycle. As babies grow older and their nervous systems mature, this behavior typically decreases.

Can a 7-month old sleep with their eyes open?

Yes, babies at different ages, including 7-month-olds, may sleep with their eyes open. If this behavior is accompanied by other discomfort or eye issues, consult your pediatrician.

At what age do babies stop sleeping with eyes open?

The age at which babies stop sleeping with their eyes open varies. As their nervous systems mature, usually within the first year, this phenomenon should gradually decrease.

Eye Health in Relation to Baby’s Sleep

How do I know if my baby has eye problems?

If your baby consistently sleeps with one eye open, or you notice persistent redness, dryness, or irritation in their eye, it could potentially indicate an eye problem. In such cases, always consult a pediatrician for a thorough evaluation.

Why is my baby’s one eye not opening?

If your baby’s eye isn’t opening, it could be due to various reasons such as a minor infection, injury, or a more rare condition like ptosis, a drooping or falling of the upper eyelid. This condition could be observed as your baby sleeping with one eye open. A consultation with a pediatrician or pediatric ophthalmologist is advised.

What causes one eye not to close completely?

A condition called lagophthalmos could cause one eye not to close completely. If your baby appears to sleep with one eye open, it could be due to this condition. In most cases, it resolves as the baby grows. However, you should still consult with a pediatrician.

Sleep Postures and Behaviors

Why do babies sleep with their butt in the air?

While not directly related to sleeping with one eye open, babies often sleep in the “butt in the air” position because it’s comfortable and a holdover from their time spent in the womb. This posture is entirely normal.

Why do babies suddenly cry in their sleep?

While this doesn’t directly relate to sleeping with one eye open, babies might cry in their sleep due to reasons like discomfort, nightmares, or the transition between sleep cycles. If crying persists, it’s best to consult with a healthcare provider.

Other Interesting Sleep Behaviors

What do babies dream about?

While it’s impossible to say with certainty what babies dream about, they spend much time in REM sleep, which is associated with dreaming. These dreams are likely related to the sensory impressions they’re constantly gathering.

Why does my baby sleep better in my bed?

This is not directly related to a baby sleeping with one eye open. However, some babies sleep better in their parents’ bed due to the comfort, warmth, and security they feel being close to their parents. Remember, though, the American Academy of Pediatrics advises against co-sleeping due to safety concerns.

Are babies awake when feeding with eyes closed?

Babies can indeed be awake while feeding with their eyes closed. This doesn’t directly correlate with sleeping with one eye open but is a normal behavior, especially when they are newborns and spend most of their time sleeping.

How Can Help

If you’re still feeling a bit overwhelmed by your baby’s unique sleep behaviors, there’s no need to fret. At, we provide expert guidance to help you navigate the complexities of your baby’s sleep. From common issues like babies sleeping with one eye open to more specific sleep concerns, our team is here to support you.

At, our mission is to help you and your little one have the best sleep possible. With our scientifically-backed advice and a wealth of resources, we’re committed to demystifying baby sleep for parents everywhere. Let us help you understand the intricacies of your baby’s sleep so that you both can rest easy.

In Conclusion

While it can be strange to see your baby sleep with one eye open, remember, it’s usually a phase that will pass as your baby grows and their nervous system matures. Trust your instincts as a parent, but don’t hesitate to seek expert advice when you’re unsure. Visit for more helpful information and tips on all things related to baby sleep.

11 thoughts on “Understanding Why Your Baby Sleeps With One Eye Open”

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  3. NewDadDude:
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