1.Frequent blinking of eyes 2.For every 20 minutes look far away for 20 sec 3.Drink more water 4.Do not sit in front of air conditioner 5.Take Adequate break in between 6.computer screen should be 16-30inches away 7.ensure the screen is neither too bright nor dim 8.get good sleep 9.use lubricating eye drops 6 times per day 10.ensure there is no glare from your screen.

Take a 20 second break every 20 minutes when working continuously on any screen.. can use any tear substitute to prevent drying of eyes

Vision does not get impacted, but you may get digital eye strain r computer vision syndrome. You can put OTC lubricating drops