There's a 20-20-20 rule where every 20 minutes look at something 20 feet away for 20 seconds. This helps to rest your eyes and reset from the strain of looking

There's a 20-20-20 rule where every 20 minutes look at something 20 feet away for 20 seconds. This helps to rest your eyes and reset from the strain of looking a fixed amount in front of your face for so many hours.