How do you differentiate between ocular involvement due to active tuberculosis versus latent infection in a patient with uveitis and suspected tuberculosis?

The type of ocular involvement (phenotype) is important to determine if the uveitis is related to active tuberculosis [like the presence of a single choroidal granuloma, serpiginous-like choroidopathy or choroiditis (unifocal or multifocal)] vs. a patient with recurrent unilateral anterior uveitis. ...