Fig. 2: Box plots of raw data at the five visits.

TBUT (A), u-MGYSS (B), l-MGYSS (C), t-MGYSS (D) and OSDI score (E) in the two groups. Data are median (central line), interquartile range (box margins), 5–95 percentile (bottom whiskers end to top whiskers end), and outliers (dots). u-MGYSS upper eyelid meibomian gland yield secretion score, l-MGYSS lower eyelid meibomian gland yield secretion score, t-MGYSS total meibomian gland yield secretion score, OSDI ocular surface disease index.