This happened to me for over a week! Fortunately at the time I worked for an ophthalmologist (eye MD). He said stress, lack of sleep, poor sleep are usually the causes. Very gently massaging the eye lid and sleeping may help. If that doesn't, sometimes a "shock" to the eye (his words). In my case the "shock" was needed. He put an eye drop in my eye that was one known to sting a bit...it stopped twitching instantly!