system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are vision problems so common in humans?

There are a ton of people who have to wear glasses or contacts in order to see, have humans as a species always had so much of a problem with vision? Are our eyes worse now than our ancestors were?
gpt
humans need glasses to see fine detail, like letters.  in a hunter gatherer sense, 99% of peoples vision is probably sufficient.  i suspect there are plenty of animals that would want glasses if they were intelligent enough to know they were missing out on something.  but since most land animals have a highly developed sense of smell compared to humans, they probably dont care.