what is ptosis of eyelid
PTOSIS (Droopy Upper Eyelids) Ptosis (pronounced âtoe-sisâ) is the medical term for drooping of the upper eyelid(s). This lowering of the upper eyelid margin may cause a reduction in the field of vision when the eyelid either partially or completely obstructs the pupil. Patients with ptosis often have20difficulty keeping their eyelids open.