Fig 2. Age differences and correlations between age and ocular signs, laboratory investigation.

(A) Dot plots of each patient’s age with and without KP, VO, bilateral inflammation or BHL. The mean age of the patients with KP, VO or BHL was significantly lower than that of patients without. (B) The age of the patients was negatively correlated with the number of positive ocular signs, positive laboratory investigations and total signs. *: P < 0.05, **: P < 0.01, ***: P < 0.001.