It is nothing but dryness ( computer vision syndrome),try to have normal blinking while working on computer & use some lubricating eye drops 4-5 times (Refresh liquigel)& try to read my old blog on practo  how to take precautions while working on computer, with regards

Hello Prolonged working on laptop/TV/mobile can cause computer vision syndrome. Computer vision syndrome is a condition resulting from focusing the eyes on a computer or other display device for, uninterrupted periods of time. Some symptoms of cvs include a. Headaches b blurred vision c. Neck pain d redness in the eyes e. Eye strain f dry eyes sometimes watery eyes these symptoms can be further aggravated by improper lighting conditions. Measures to reduce this include 1. Work under proper light. 2. Blink a lot. 3. Cold compresses 4. Use good lubricating eyedrop