Blepharospasm is the involuntary blinking of the eyelid which could be mild and does not need any treatment or severe enough to alter the quality of life to the patient.
Treatment is with using Botox A toxin, which is a muscle paralysing agent, when used in a low dose of local infiltration, it could control these annoying eyelid movements.
The toxin, usually last for 6 to 9 months at which time another dose might be needed.
The toxin could infiltrate locally and cause paralysis to the surrounding muscles, which lead to its side effects, such as diplopia, or dropping of the eyelids.
Most of the side effects do not last for more than 3 months.