Astigmatism

Step back from the screen and, every 20 minutes, gaze 20 feet away

for 20 seconds. Keep the lighting soft, not too dim or too harsh,

and remember to blink so your eyes don't dry out. Finally, for

each hour you play, take a 15-minute break - stretch your legs, sip

water, and let your eyes rest.

For this challenge you will need Iris Shaders mod installed

HINT: Have you seen that guy named Entropy? He is laying low

somewhere.