To investigate the comparison of total antioxidant capacity in the serum of patients with pterygium and control subjects.

This case- control study was conducted in Hospital of Vali-e Asr (peace upon to him) during year 2016. The 31 people in patient group with pterygium and 35 people in the control group were enrolled by convenience sampling. The antioxidant power measurement of samples was done according to the conversion of ferric iron (Fe3 +) to ferrous iron (Fe2 +). The collected data ware entered to software SPSS 21 and were analyzed by chi-square and Mann-Whitney tests at the level of α = 0.05.

: The 31 people (47%) were in patient group and 35 (53%) were in the control group. The two groups were matched in terms of age, gender and place of residence. The mean of antioxidant capacity in patients was 842/55±161/46micromoles per liter and antioxidant capacity in healthy controls was 856/77 ± 209/41micromoles liters (p=0.8). In the comparison of mean serum antioxidant capacity in healthy individuals in the serum of people with pterygium based on gender the results showed that the antioxidant capacity mean in male subjects has been 894/05 ± 176/82 micromoles per liter and in females 780/01 ± 118/33 micromoles per liter that the observed difference have been reported statistically significant (p=0.008).

The results of this study showed that the full level of serum antioxidant capacity in patients has been less than the mean of antioxidant capacity in control subjects however the observed difference has not been significant.