Eye twitching is a repetitive, uncontrollable blinking or spasm of the eyelid, usually the upper lid, which usually affects the eye muscles of both eyes. Fatigue, stress and caffeine are causes of eye twitching. Eye strain has numerous causes, such as looking at a computer screen for a long time, reading for extended periods of time, and exposure to bright lights. People who get eye strain is easy to experience pain, irritation, headaches, even eye twitching. Based o this conditions, the one should use eyes in a proper time.