ABSTRACT Purpose: In this study, leukocyte, lymphocyte, neutrophil, platelet count, mean platelet volume (MPV), neutrophil/lymphocyte (NLR) ratio and platelet/lymphocyte ratio (PLR) were retrospectively evaluated in patients with idiopathic acute anterior uveitis. Methods: Medical records were retrospectively reviewed from March 2016 to February 2020. 50 patients, 25 men and 25 women, and 50 healthy volunteers, 25 males and 25 females, as the control group were included in the study. Blood samples of the patients were taken before starting treatment. A complete ophthalmological examination including corrected visual acuity, tonometry, slit lamp and fundus examination was performed in all patients. Gender, age, leukocyte, neutrophil, lymphocyte, platelet, MPV, PLR, NLR values of the patients were recorded. Results: In this study, a statistically significant difference was found in the values of leukocyte (p<0.001), neutrophil (p<0.001), platelet (p<0.001), NLR (p<0.001) and PLR (p<0.001). There was no significant difference between the two groups in terms of the number of lymphocyte (p=0.063) and value of MPV (p=0.051). Leukocyte, neutrophil, platelet count, NLR, PLR values were found to be higher in the uveitis group compared to the control group. Conclusions: In this retrospective study, it is thought that leukocyte, neutrophil, platelet count, PLR, NLR, levels are significant in patients with idiopathic acute anterior uveitis and can be used in early diagnosis.