system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come we still have bad eyesight passed down genetically to today if early human ancestors depended on eyesight for survival such as hunting?
gpt
We have lots of different eyesight problems then in the past.

1. We live for a longer period of time and eye problems can be exagerated with age. 

2. Many current environmental impacts on our vision (artificial light, eye strain, computer screens, chemicals we encounter, etc.

3. Depending on your vision you could still probably hunt or at least find a use in an ancient tribe - gathering berries, tending fires, building huts, or more.