There were statistically significant improvements in the OSDI score ( -8.48 0.97 , -5.69 0.78 ; P = 0.02 ) , fluorescein ( -1.43 0.21 , -1.02 0.18 ; P = 0.03 ) , and Rose Bengal staining ( -1.12 0.26 , -0.75 0.12 ; P = 0.03 ) , goblet cell density ( 89.65 14.39 , 70.36 16.75 ; P = 0.03 ) , and impression cytological findings ( -0.53 0.12 , -0.34 0.90 ; P = 0.01 ) in group 3 compared with those in group 2 at 3 months .