CCR5 and Keratoconjunctivitis sicca: Therefore, a reasonable assumption was that after ocular acid burn, the contents of inflammatory factors CXCR3 and CCR5 in the eyes of patients are increased, and their combination with ligand leads to recruitment of T1 lymphocytes on the ocular surface, which leads to immune inflammatory response on the ocular surface, thus forming the long-term complications of dry eye.