Originally Posted by swetlana

Sometimes you may experience involuntary twitching in your eye. Eye twitching or Blepharospasm, as it is technically known, is a perplexing phenomenon experienced by nearly a million people every year. While, basically eye twitching is not much of a dangerous disorder, for some it can lead to chronic irritation or vision problems. Most often, this blinking disorder results due to excessive fatigue or stress.

There are two basic types of Blepharospasm. While the first type called 'Benign Essential Blepharospasm' (BBB) is non life threatening, the other type is of a more severe type and may be linked to neurological disorder. The causes for eye twitching may vary widely from person to person. However, some of the commonly observed causes include:

Corneal irritation or injury
Stress and fatigue
Lack of sleep
Eye strain or prolonged staring
Neurological disorders
Heredity

Though, eye twitching is a fairly common disorder, you cannot always take it lightly. You need to look out for signs to confirm the seriousness of the problem. Most often the problem starts with excessive involuntary twitching when exposed to bright light. While, in less serious cases, the twitching may ward off after a good night's sleep, in more severe cases, the twitching may persist and the eyelid may remain shut for several hours at a stretch.