Not all humans have blurry vision underwater [1]. It seems, from the article, that children from that tribe can learn constrict their pupils and accommodate the

Not all humans have blurry vision underwater [1]. It seems, from the article, that children from that tribe can learn constrict their pupils and accommodate their lenses so as to see much better underwater. But the quote that followed it is probably much more relevant to this discussion..."Seals and dolphins have a similar adaptation." Since orcas are actually the largest of the dolphin family and not whales, it might apply to them as well. [1] http://www.bbc.com/future/story/20160229-the-sea-nomad-children-who-see-like-dolphins http://www.bbc.com/future/story/20160229-the-sea-nomad-child...