It's computer vision syndrome.
Resting your eyes at least 15 minutes after each 2 hours of computer use.
Blink more often
Looking away from the computer and into the distance for at least 20 seconds every 20 minutes.
Enlarging the text on your computer screen.
Reducing glare from nearby light sources.
Consider computer glasses.
Next Steps
Get dry eye treatment if above don't work. Many options available
Health Tips
Don't worry it's reversible