system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] How does Daredevil sleep?

Basing this on how the Netflix TV show depicts Daredevil's extrasensory abilities, if he can 'see' light/heat then how does he stop it to sleep? Are the things Matt 'sees/detects' lost when he shuts his eyes?
gpt
He doesn't literally see the "world on fire" from his eyes. That's just the  mental picture he paints of the world thanks to the input he gets from his senses. He can feel a room's heat, bounce some sonar around with his hearing, pick up all the smells, and when he puts it all together the rough sketch is his world on fire that he imagines. 

It takes superhuman focus to just do daily activities when his senses are so strong. He meditates and applies that same focus to fall asleep when he wants to.