Ptosis (or blepharoptosis) is a drooping or falling of the upper eyelid. Complete ptosis is due to complete oculomotor nerve palsy. Partial ptosis is due to a dysfunction of the sympathetic pathway leading to paralysis of Muller muscle

Note that facial nerve paralysis prevents screwing of the eye. 

Share article

Article information

rID: 60240
System: Head & Neck
Section: Signs
Tag: eyelid, eye
Synonyms or Alternate Spellings:
  • Complete ptosis
  • Partial ptosis
  • Blepharoptosis

Support Radiopaedia and see fewer ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.