system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does looking far help relax the eyes when our vision is 2 dimensional?
gpt
Your eyes are controlled by muscles as almost anything else in your body. Looking at screens makes your eyes fixate very close spots, narrowing down your field of view both mentally and physically. By looking far, you allow your eyes to use their muscles in another way and leave a tense state as well as your brain to process different signals. 

See it this way: After spending a day with your head turned to the left, looking straight or even right will feel very relieving.