Blinking - Symptom


Blinking is essential to eye health.  When you blink the eye is bathed in tears that remain on the eye surface by creating a tear film.  This protects the eye from injury, regulates sensory input and provides the eye with nutrition, comfort and enables clear vision. 

People blink at different rates.  Frequent blinking can be advocated to blepharospasm, a problem with contact lenses, hemifacial spasm and stroke.  It can also be caused by dry eye syndrome or if there is something in the eye.

Infrequent blinking may be caused by cranial nerve palsy where there is involuntary muscles twitches on one side of the face or Parkinson's disease where there is often a slower than normal rate of blinking.


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