Long-term use of TB drugs (e.g. isoniazid, etc.) can cause damage to the eyes, including narrowing of the visual field, loss of vision, and optic neuritis. 1. Reduced visual field: Long-term use of TB drugs may lead to intolerance to these drugs. High doses may cause amblyopia, red-green color blindness, and narrowing of the visual field due to neuritis. 2. Loss of vision: long-term use of tuberculosis drugs may lead to blurred eyes, which may lead to an imbalance of hormone levels in the body, causing damage to the optic nerve of the patient and affecting the patient’s normal vision. 3. Optic neuritis: long-term consumption of tuberculosis drugs may lead to poisoning causing brain and brainstem involvement and secondary nerve damage, which may lead to optic neuritis. When the above symptoms appear, MRI should be conducted to examine the brain, and OCT to examine the eyes in order to make qualitative diagnosis and treatment to control the deterioration of the condition and recover as soon as possible. When taking TB medication, it should be taken under a doctor’s diagnosis to avoid adverse reactions. It is also important to have regular checkups and adjust the dose of the medication.