The changes of central total corneal and corneal epithelial thickness after exposure.

<p>(A,B) The changes of central totalcorneal thickness from post exposure 0 to 30 minutes (A) and 0 to 4 hours (B). (C) The changes of central corneal epithelial thickness from post exposure 0 to 4 hours. * and ** indicated significant differences compared to the pre-exposure group (*: p<0.05; *: p<0.01 by Student’s<i>t</i> test).