This morning was my turn to get up with Little Man and, in a rare and excellent turn of events, he didn’t wake up until 7am. We were both in a good mood when my husband came downstairs to join us an hour later, and we all started playing together on the floor. At one point my husband jokingly said to Little Man “Blink if mummy’s being difficult!” and I cracked up – I knew I was safe because Little Man just. doesn’t. blink. And he’s not alone – hardly blinking is one of those weird developmental things that’s actually normal for babies. But why don’t babies blink much, compared to adults?
Why doesn’t my baby blink?
How often do babies blink?
If you’ve spent much time around babies, you’ve probably noticed that they don’t blink much. This actually freaked me out slightly when I was still in hospital just after Little Man was born and I realised he wouldn’t blink for what felt like incredibly long amounts of time. Fortunately, a quick Google told me that it was totally normal. In fact, babies often only blink around once or twice a minute. When you consider that adults blink around fifteen times a minute, that’s a pretty huge difference.
Why do we need to blink in the first place?
Apparently, blinking is still a bit of a mystery to science, which is a mad thought given that there are billions of humans walking around on the surface of the planet blinking 21,600 times a day each. In fact, we blink so often that adults actually spend around 10% of our waking hours with our eyes shut.
Blinking serves a variety of purposes:
- Lubricating the eyeball by renewing your tear film, which not only nourishes the cornea, but also helps ensure a smooth optical surface to let your eyes see clearly.
- Clearing away dust particles and any other debris from the eye.
- Scientists now think that blinking may have a role in allowing your brain to get brief mental respites that help you to concentrate more effectively.
So… why don’t babies need to blink much?
Babies’ eyes presumably need to stay moist just like adult eyes. So why don’t babies need to blink as much as adults?
It’s been suggested that because babies sleep so much, they don’t need to blink as much, as they spend so much time with their eyes shut. Babies’ eyes actually don’t even make tears for the first month of life. Babies also have smaller eye openings than adults, proportionate to the overall size of their eyes. As a result, they might just not need as much eye lubrication as adults.
Alternatively, it’s also been suggested that babies may blink less because they need to focus more in order to take in all the visual information they’re receiving, so they can’t afford to take the short mental breaks that blinking affords to adults. Or that it may be related to babies’ underdeveloped dopamine systems.
So… What does all that mean?
As is so often the case when I’m writing about baby and child development on this blog, the answer seems to be: we don’t really know why babies don’t blink as much as adults. But the take-home message is: it’s totally normal for your baby not to blink much, so don’t worry.