Eyelid twitching. Any cause of eye irritation, stimulant use such as caffeine/ amphetamine/ cocaine, lack of sleep, excessive stress, neurologic disease (rarely).
Eye twitches. Common causes of eye twitching include lack of sleep, stress and "eye fatigue", i.E, spending too much time looking at the tv, computer screening, straining the eyes, not having the right prescription for glasses. If it's not getting better, see your doc and get evaluated for more uncommon causes. Good luck!