Give your eyes a break by forcing them to focus on something other than on your screen . hold a finger a few inch in front of your face ; focus on the finger as you slowlymove it away;focus on something far in the distanceand then back to finger; slowly bring the finger back towards your face

Finger position is an all time useful Mudra and can be done for any length of time, any time, any place and will only help in adding to the benefits. This is the mudra which, along with the Apan Mudra, precedes any efforts at higher meditation by the Yogis and saints.