A 10-year boy present with bilateral chronic uveitis. Which investigation should be ordered –

Investigations used in the evaluation of uveitis Anterior Acute:- Urine for WBC, CBC, ESR, CRP, X-ray sacroiliac joint, HLA B-27, Chest X-ray, VDRL & FTA-ABS for syphilis, Serum ACE, Mantoux test Chronic:- Gonioscopy, Antinuclear antibody Posterior Acute:- None Chronic:- Eosinophil count, serum ACE, ELISA for toxoplasma & toxocariasis, chest X-ray, Mantoux test, Virus cultures, serum antibodies in suspected cases of CMV, HSV, VZV