Material and Methods: This study enrolled 85 eyes with panuveitis or posterior uveitis. Forty-fi ve eyes which were associated with Behcet disease constituted Behcet group and 40 eyes which were not associated with any systemic disease constituted idiopathic group. Groups were similar (p>0.05) according to age, gender, anatomic localization, duration of disease, duration of follow-up, and best corrected visual acuity (BCVA). Three different uveitis scoring systems including UAS, FASS and BOS24 were compared between the groups. Correlations between BCVA and 3 scoring systems were also performed for each groups.

Results: Bilaterality was signifi cantly higher in Behcet group when compared with idiopathic group (91.1 % vs. 70.0 %, p = 0.01). None of the uveitis scoring systems revealed signifi cant difference between groups (p>0.05) but the difference was greatest with the BOS24 scoring system (p=0.19). BCVA and all 3 scoring systems were moderately and signifi cantly correlated in both groups (p<0.05). The highest correlation of BCVA was observed with BOS24 scoring system in both Behcet (r=-0.63, p<0.01) and idiopathic group (r=-0.63, p<0.01).

Conclusion: Uveitis grading systems are comprehensive, reproducible, and feasible ways for measurement of infl ammation in uveitis with posterior segment involvement. Keywords : Uveitis activation score, the Behcet disease ocular attack score 24, fl uorescein angiography scoring system, Behcet uveitis, idiopathic uveitis