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

Your problem is due to overuse of smartphone, computer & watching TV for long time without blinking leading to dryness (computer Vision syndrome).Most of the computer professional do not know how to work on computer for long time leading eyestrain &headache,while working on computer ,number of blinking goes down drastically from around 24 per minute to around 8 per minute, it is root  of all the problems,so working on computer one should try to have normal blinking & try to look away from computer screen  every 10 minute&take 15 minute break every two  hours. One should  also use lubricating eye drops 5-6 times daily on regular basis (Refresh liquigel) if you are working on computer for long hours, with regards