Ptosis is the medical term for a droopy eyelid. Many children are born with a weak muscle in the eyelid. It tends to be somewhat variable with the eyelid being lower when the child is sleepy or sick. If mild, this often improves with growth. For severe cases, eyelid surgery is needed, particularly when the eyelid is causing visual damage called amblyopia. Surgery can be completed at any age; however, we try to wait until around kindergarten age to give the best cosmetic result.