Blepharospasm and apraxia of lid opening(ALO) are non-paralytic causes of involuntary eyelid closure. Clinically itis difficult to differentiate blepharospasm and ALO, and these two conditions are sometimes associated. We report acase of pretarsal blepharospasm presenting as apraxia of lid opening. 55-year-old woman was noted to have voluntaryeye opening difficulty. We synchronously record the electromyographic(EMG) from the levator palpebrae superiorisand the orbicularis oculi muscles in this patient. This results suggested that she has a variant of blepharospasm due toabnormal contraction in the pretarsal orbicularis oculi.
