system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do our eyes 'burn' when we don't get enough sleep?
gpt
Because the cornea gets strained, water is reserved as the body goes into preservation mode after being awake for so many hours and tears are not formed on the cornea to flush them periodically, which allows the cornea to have extra sensitive exposure to particles in air, air itself, etc. causing the burning sensation.