Abstract: Choroiditis is a group of diseases with complex etiology and its diagnosis can be challenging. Clinically, diagnosis should be based on the morphological characteristics of the fundus lesions. However, infectious diseases may sometimes show the same fundus lesions as noninfectious diseases. Therefore distinguishing the infection fators is critical during the diagnosis of choroiditis. Fundus fluorescence angiography (FFA), indocyanine green angiography (ICG) and other investigations are important tools for the diagnosis of choroidal disease. Choosing optimal treatment based on the correct evaluation of vision damages is of great significance.