Need for the study:

Refresh preservative-free, single-dose eye drops (PVA-P) 1 drop per eye, 4 times daily (n = 35) Patients with mild to moderate DED (n = 79); Cationorm vs PVA-P mean age (±SD): 61.3 yrs (±15.4) vs 61.9 yrs (±12.5); patients were well balanced at baseline with respect to objective signs (including TBUT, CFS, Lissamin green staining, Schirmer ... ................
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