It is also called eyelid tremor, which is mainly caused by the repeated contraction of orbicularis oculi muscle. There are two kinds of pathogeny.
The first one is eye disorders, such as refractive errors, conjunctivitis, keratitis etc;
Secondly and most commonly, it can be caused by insufficient sleep and rest, anemia or even insobriety, which can all lead to disorders of the nervous system.
Just take more rest and do some eye exercises, apply hot compresses over the whole face, and also take some Vitamin B. Be conscious to relax your nerve, and keep off stimulating food such as alcohol, garlic, seafood, strong tea, spicy hot pot, etc. Fresh vegetables, course food grains, soybean products, Chinese-date and lean meat is recommended.