There was no significant difference in corneal healing as measured by the percentage of patients with persistent fluorescein uptake at 48 hours between the two groups ( 23.9 % vs. 21.3 % , difference = 2.6 % , 95 % CI = -14 % to 20 % , p = 0.761 ) or persistent symptoms at 48 hours ( 21.7 % vs. 21.3 % , difference = 0.4 % , 95 % CI = -16 % to 17 % , p = 0.957 ) .