Evaluation of a Ptosis Patient

Ptosis (from Greek Ptosis or πτ?σις, to "fall") is a (drooping) of the upper or lower eyelid.

Overview

When ptosis is asymmetrical (worse on one side) or unilateral, we must consider Hering's law of equal innervation

Evaluation of patients with moderate (or better levator function) might involve 2.5% phenyelphrine drops to assess the response.