1. From the Retinal Diagnostic and Treatment Division and
2. Glaucoma Section, Hospital de Olhos de Araraquara, Araraquara-SP, Brazil;
3. Instituto de Fi´sica de Sa~o Carlos–USP, Sa~o Carlos-SP, Brazil; the
4. Federal University of Sa~o Paulo, Sa~o Paulo-SP, Brazil; and the
5. Division of Ophthalmology, Cole Eye Institute, The Cleveland Clinic Foundation, Cleveland, Ohio.