The most common eye disease associated with tuberculosis infection in clinical practice is herpetic keratoconjunctivitis, which is an allergic reaction to tuberculosis bacteria or its products. It is more common in children with primary tuberculosis, especially those under 5 years old. Sometimes it appears as the first symptom of primary infection, and active tuberculosis in other parts of the body is often discovered as a result. This disease is more common in children with tuberculosis who have a high degree of allergic reaction. Some people also believe that it is a true tuberculosis lesion during the period of hematogenous dissemination, although tuberculosis bacteria have never been found in the lesion. Most children have a history of contact with patients with open pulmonary tuberculosis. As long as they leave such an environment, they will recover quickly, but if they return to the original environment, new herpes will soon appear.