Blepharospasm, which is the most frequent cranial dystonia, is characterized 
clinically by bilateral, synchronous, and symmetric involuntary orbicularis 
oculi muscle contractions. Assessment of motor abnormalities in patients with 
blepharospasm is an important issue in the clinical practice of movement 
disorders. This video highlights the most important aspects in the clinical 
evaluation of blepharospasm. We will show how we approach the main motor 
abnormalities related to blepharospasm. Additional features that often 
characterize blepharospasm, such as increased blinking, sensory tricks that can 
transiently improve muscle spasms, and apraxia of eyelid opening will also be 
discussed. Then, we will summarize the main aspects that differentiate patients 
with blepharospasm from other conditions characterized by eyelid disturbances. 
Finally, we will take into account the possible therapeutic implications of an 
accurate clinical examination of patients.