Evaluation of a Ptosis Patient

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

Overview

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

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

Herrings Law