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Mean conjunctival fluorescein intensity showing the reactive oxygen species (ROS) levels in the untreated (UT) control, experimental dry eye (EDE), balanced salt solution (BSS), and 0.001%, 0.01%, and 0.1% Chamaecyparis obtusa (CO) extracts groups. ∗P < 0.05 compared with the EDE group. †P < 0.05 compared with the BSS group. ‡P < 0.05 compared with the 0.001% CO extract group. §P < 0.05 compared with the 0.01% CO extract group.
