phenotype affects entity Muscle weakness Weakness of orbicularis oculi muscle 2013-12-08T08:12:54Z UMLS:C1839030 Reduced strength of the orbicularis oculi, the circumorbital muscle in the face that closes the eyelid. Weakness of orbicularis oculi muscles HP:0012507 Weakness of facial musculature orbicularis oculi muscle decreased orbicularis oculi muscle strength