Figure 1.

Ocular symptoms and signs with preserved and preservative-free glaucoma medications.

Notes: Frequency of signs and functional symptoms at visit 1 and visit 2 after switch from preserved to preservative-free eye drops or decrease of the number of preserved eye drops. Republished with permission of Wichtig Editore Srl, from Eur J Ophthalmol, Ocular symptoms and signs with preserved and preservative-free glaucoma medications, Jaenen N, Baudouin C, Pouliquen P, Manni G, Figueiredo A, Zeyen T, volume 17, 2007;⁹⁷ permission conveyed through Copyright Clearance Center, Inc.