CCL2 and dry eye syndrome: In the no dry eye group, 1 day postoperative concentration of IL-1β, IL-6, IL-8, MCP-1, TNF-α and IFN-γ were 51.42 ± 6.05, 119.51 ± 12.19, 443.92 ± 34.51, 2128.74 ± 215.64, 159.73 ± 12.98, and 51.54 ± 6.82 pg/ml, respectively.