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The effect of Liriope platyphylla extract (LPE) on corneal smoothness in urban particulate matter (UPM)-induced dry eye syndrome (DES). (a) Representative corneal images of Control (CTL), Vehicle (Veh), and LPE (1, 5, and 10 mg/mL) groups. (b) Graph of corneal irregularity scores. Data shown are mean ± standard error. ∗∗p < 0.01 vs. CTL; #p < 0.05 or ##p < 0.01 vs. Veh.
