Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Effect of oral supplements of CFW on tear secretion after topical exposure to PM2.5 in SD rats. On days 0, 7, and 14, tear volume was determined using phenol red tear threads and the length of color-changed thread was measured. The data are expressed as the means ± standard deviation (n = 5). * p < 0.05, ** p < 0.01, and *** p < 0.001 compared to the control group. # p < 0.05, ## p < 0.01, and ### p < 0.001 compared to the PM2.5-induced DED group.
