Eyelid muscle spasm
The orbicularis muscle is a circular muscle beneath the eyelid skin that enables the eyelids to blink and close.
When the delicate nerve
fibers responsible for stimulating the orbicularis muscle to contract become irritable, this can result in a transient involuntary localized twitch (myokymia
), or this may be due to a condition known as blepharospasm (eyelids only) or hemifacial spasm (lid/face).