Uveitis is a very important ocular disorder as sometimes a very early iritis is treated for conjunctivitis. If we have a unilateral red eye persisting for few days if this patient comes to a GP and they suggest kindly refer this patient to an ophthalmologist to exclude iritis since reaction in a c and celles in a c may be the oly presenting feature classification of uveitis makes us to understand the pathophysiology.

We have anatomical classification which is  Anterior uveitis Posterior uveitis Pan-uveitis    I always found sorbs classification of uveitis very outstanding this is  Granulomatous  Non-granulomatous    In granulomatous causes,  Non pyogenic organisms  Tuberculosis Syphlis Leprosy Brucellosis leptosporiass    Filterable viruses Rickhtesa  Herpes simplex Herpes zooster Bechets VKH Disease Lympho raneloma venerum Some unknown causes  Protozoan  Toxoplasmosis  Trypanosomosis …