Eyelid spasm or twitching (blepharospasm) is associated with an abnormal function of the basal ganglion, the part of the brain responsible for controlling the muscles.
Blepharospasm can happen to anyone, and the causes in any given individual may not be clear. Its onset can come without any warning. Sometimes the twitching eases or disappears altogether when a person is sleeping or concentrating on a task.
Some things are associated with the development of an eye twitch or may prolong it. These include:
- Irritation of the eye surface or inner eyelids
- Lack of sleep
- Physical exertion
In rare cases, heredity may be involved in the development of blepharospasm.
Other eye conditions may precede blepharospasm or occur at the same time. These include blepharitis, dry eye, light sensitivity and pink eye (conjunctivitis).
Very rarely, eye twitching may be a sign of a brain or nerve disorders, such as Bell’s palsy or Parkinson’s disease. In such cases, the eye twitching is usually just one of a number of symptoms.
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