this problem is kn.as computer vision syndrome. you are using correct medicine.
Next Steps
you must follow 20..20formula ie close your eyes for 20 seconds after every 20 minutes. keep your screen at least 45 to to cm from eyes. don't face towards AC while working. and keep your eyes wet by wiping them with wet wipes after every 1 or 2 hours.
Health Tips
if like please give feedback