Ok I get we all look at small letters and images on screens and paper these days. Is this why in the last 150 years or so millions and millions of humans need spectacles? Is it because we are meant to be looking at things from a distance rather than nearby so our eyes haven’t caught up?
In: Biology
Most people with glasses can see well enough without them to survive in a group of people in nature. You don’t need perfect 20/20 vision to find berries. And as long as you can contribute to the tribe, people will help you out. Those with particularly bad eyes were probably eliminated, although there is evidence that tribes frequently cared for those that could not care for themselves.
Also, you really only need to get to reproductive age for a trait to be carried forward, and most people still have relatively good eyes by age 20.
Latest Answers