There are a few ways to have bad eyesight
It looks like most of the short sightedness is caused by lifestyle since it is much more prevalent in places where children spend a lot of time indoors
The others would have affected our ancestors as much as us
There are a few ways to have bad eyesight
It looks like most of the short sightedness is caused by lifestyle since it is much more prevalent in places where children spend a lot of time indoors
The others would have affected our ancestors as much as us