system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can't we see clearly underwater without using goggles?
gpt
Your eyes are made of lens that reflect light so it hits the nerves in your eyes and sends that information to the brain so your brain can make out an image. Well light moves different through different mediums and water refracts light much more than air. Basically put our eyes did not evolve to be able to see light correctly under the water.  Interesting note, if you take a fish out of the water, his eyesight would be the same as our eyesight underwater!