Children who learn to see underwater clearly

[AptaMer]

We all know that merpeople have always been depicted as seeing clearly underwater without masks or goggles or lenses, which is why it's annoying that if you go au naturel with nothing on your eyes, you can't see clearly.

I've always wondered whether there was some kind of contact-lens you could put on to see clearly underwater, but it seems that maybe people have the ability to see underwater if they can learn a certain relex. The video below is about how some children who freedive from a very young age learn to develop a reflex that allows them to see underwater.



These children start learning at a very young age, I wonder if one can learn this at an older age