The purpose of this study is to evaluate the significance of differences in serum ACE and lysozyme levels of patients with ocular involvement of autoimmune diseases such as HLAB27+ ankylosing spondylitis (AS), HLAB51+ behcet’s disease (BD) and presumed sarcoidosis and ocular involvement of infectious diseases such as QuantiFERON(®)-TB Gold+ presumed latent tuberculosis (TB) and presumed latent syphilis compared to control group by using pairwise comparisons between the groups. The gene discussed is ACE; the disease is Behcet disease.