Fig. 2From: Prevalence of dry eye disease among Chinese high school students during the COVID-19 outbreakOSDI score by item in DED subjects Each question ranged from 0 to 4 according to the frequency (0=none of the time, 1=some of the time, 2=half of the time, 3=most of the time, 4=all of the time for the last week). N/A meant the individual did not perform the task or stay in the situation for the last weekBack to article page