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The most common type of eye twitch is a series of muscle contractions called eyelid myokymia, which produces involuntary and intermittent contractions of the eyelid, typically the lower one.

Eyelid myokymia usually goes away on its own without medical intervention, the experts said.

The study defined eye twitches, or chronic myokymia, as “fine, continuous, undulating contractions” across the muscle.