Excessive, Involuntary Blinking — Blepharospasm
Blepharospasm is excessive, involuntary blinking. Benign essential blepharospam, refers to this spasm in both eyes. Benign means the condition isn't life-threatening and essential means that it is of unknown cause.

Some patients with blepharospasm may have associated twitching (dystonias) of the face and neck.

Many people are not greatly troubled by BEB but it can have a major impact on a sufferer's life. Patients may be unable to drive, read, and watch television or work.