Since he is a regular computer user hence he is likely to develop computer vision syndrome. Please put some lubricant eye drops eg teardrops 3to 4times daily and ocupol.dx eye oint to be rubbed twice daily on lids and take some antioxidants cap once daily eg revital one cap daily.
Next Steps
Also follow some precautions eg
follow 20.20.formula ie close your eyes for 20.seconds after every 20 minutes and keep proper distance between eyes and screen ie approx 20.inches.wash your eyes frequently with fresh and do cold compresses by ice. don't sit facing the ac or blowers and consume lot of fresh fruits and vegetables.