Figure 4. Correlation studies with SODQ pain score. IL-6 and IL-8/CXCL8 were significantly increased for pain score 1 compared to pain scores 0 and 2 (OS *p=0.003 for IL-6; *p=0.027 for IL-8/CXCL8; OD p-values were not significant but followed the same trend as OS). IL-1Ra levels increased with pain in both eyes but did not reach statistical significance. IL, interleukin; OD, right eye; OS, left eye.