It is called as eye twitching.
Most common causes are
3. Lot of caffeine intake usually resolves in few days to weeks. Sometimes it can be due to eye conditions
2. Dry eyes
3. Eye infection
very rarely cn be a sign of nerve disorder. Start eye drops refresh tears 4 times a day.
Take proper rest and sleep.
Less intake of drinks. If not improving consult a ophthalmologist
and a neurologist