Post #500

body, digital "we need like "unclench your jaw" posts but like for eye strain [...] take off your glasses if you wear them for 20 seconds [...] look at something 20 feet away, then 10, then 5, then 1, then if you can your nose" [note: 20 feet = 6 meters, 5 ft=1.5m, 1=0.3]