Reflection of ceiling light, or glare from windows.
Eye muscle strain caused by looking at a near screen for too long.
Symptoms such as eye strain, blurred vision, slow in focusing, double vision, headaches appear when the ciliary eye muscles are tired and cannot focus properly.
Heat generated and dispersed from the back of the computer monitor accelerates tear evaporation.
Air-conditioning in computer room dries up the air and accelerate tear evaporation.
Over concentration on near screen reduces blinking frequency, which leads to inadequate tear replacement and makes the eyes itchy and red.
On the other hand, dryness and itchiness of eyes can stimulate excessive tear production, causing watery eyes
Blurred letters on the screen