Symptoms are tiredness and irritation in eyes. Ask him to frequently blink in front of screen, minimise use of screen except his work, look at something 20ft for 29 Sec after every 20 min, take good amount of fluids in a day, and sleep 7-8 hrs at night

The symptoms of dry eyes are like irritation, redness, reflex watering, occasional blurring of vision, issues with night driving etc Few instructions: 1. Follow 20-20 rule. After every 20 minutes of any near work say laptops, mobile or reading take a break and focus for 20 seconds at a far away object at least 20 meters away. 2. Frequently blink your eyes while working, if not possible to remind yourself to blink then at least after 30 minutes of your work slowly close your eyes 10 times. 3. Adequate water intake at least 3-4 litres per day 4. Adequate sleep at least for 7-8 hours 5. Do not rub the eye 6. Use anti reflective coated glasses if you have spectacles 7. Cold compress to the eyes 3 times a day (Can dip clean cotton in refrigerator cold water and keep over closed eyes for 30 seconds)