Eye twitching may be linked to caffeine, stress, alcohol or fatigue, according to WebMD. The twitching is the result of an involuntary movement in the eyelid, occurring as often as every few seconds to several minutes apart.
Regardless of their cause, these rapid movements of the eye are harmless and typically go away on their own.
In more severe cases, the spasms may be a sign of a brain or nerve disorder or a specific eye condition, explains WebMD, including pinkeye, light sensitivity, Bell's palsy, Parkinson's disease and Tourette syndrome.
Eye twitching can also be a side effect of medications used for sufferers of epilepsy or psychosis.