Xi''an People''s Hospital(Xi''an Fourth Hospital) Affiliated Northwestern Polytechnical University Shaanxi Eye Hospital Xi’an 710004 Shaanxi Province ChinaDepartment of Infection Immunity&Cardiovascular Disease University of Sheffield Medical School Sheffield S1O 2RX UK;
Department of Ophthalmology Shaanxi Provincial People’s Hospital Xi’an 710068 Shaanxi Province China;
Xi''an People''s Hospital(Xi''an Fourth Hospital) Affiliated Northwestern Polytechnical University Shaanxi Eye Hospital Xi’an 710004 Shaanxi Province China;
latent tuberculosis; ocular tuberculosis; diagnosis;