Why did humans develop bad eyesight?
Humans actually have great eyesight. We are great at discerning objects, seeing movements, very clear sight, we see colors, etc. The reason eye problems are so prevalent nowadays is because 50,000 years ago, if there was someone with bad eyesight, they would die. When civilization came about, and technology, those with eye problems had a better chance of surviving to adulthood and thereby passing on their genes. The genes that cause poor eyesight were passed on and became more common in the population.
