Drooping Eyelid (Ptosis): References

What Is Ptosis? American Academy of Ophthalmology. http://www.aao.org/eye-health/diseases/what-is-ptosis. Mar 10, 2014. Accessed October 2016.

Ingraham H, ed. American Academy of Ophthalmology. 2015-2016 Basic and Clinical Science Course. San Francisco: American Academy of Ophthalmology; 2015; v.1-13.

Yanoff M, Duker JS. Ophthalmology, 4th edition. Philadelphia: Mosby, 2013.