Hi
You need to get a dilated checkup done . By your problem, its evident that you need a proper glasses prescription . Pl start putting lubricating eyedrops 4 to 5 times a day ( refresh tears )
Follow rule of 20 -20-20- after every 20 minutes , take a 20 seconds break and look 20feet ahead.
Next Steps
visit an ophthalmologist near you
Health Tips
Adequate hydration
proper nutrition