Optic neuritis generally refers to various inflammatory lesions involving the optic nerve. It is the most blinding optic nerve disease for young and middle-aged people. Traditional Chinese medicine has a good effect on restoring the visual function of patients with this disease.Professor Zhang Lixia started from the theory of "the time that Jueyin disease is about to heal" and based on the diagnosis and treatment thinking of "time-distinguishment and pathogenesis-determination", combined the time-distinguishment and syndrome differentiation. When the human body's healthy qi "gets the help of the nature" and the debate between the good and evil of the disease "healed" or "not healed", Professor Zhang Lixia gave Wumei Pill to help the patients adjust the smooth connection of yin and Yang and dredge the Qi mechanism.The patient in this case, Shi Mou, male, 34 years old, suffered from visual impairment in his right eye for nearly 1 year and aggravated for 2 months. Comprehensive analysis by the four examination methods shows that the patient had clear mind and good spirit, was afraid of heat, but was afraid of cold in lower limbs,had night sweat, good appetite, poor sleep, couldn't sleep even until 1~3 a.m., had loose stools, 20 lines a day, frequent urination at night, 3~4 times a night; The tongue is dark purple with cracks, the moss is white, thick and greasy, and the ulnar pulse is thin. It was diagnosed as sudden blindness of the right eye (mixed cold and heat syndrome), which was treated with traditional Chinese medicine to clear the upper part and warm the lower part. After treatment, the patient's visual acuity was significantly improved and no blurred vision.,Summary of case history ,The visual acuity of the right eye decreased repeatedly for nearly 1 year and worsened for 2 months.,TCM diagnosis ,Sudden blindness of right eye (mixed cold and heat syndrome),Western medicine diagnosis ,Optic neuritis of right eye,Therapeutic methods ,Oral Chinese medicine decoction treatment.,Clinical outcomes ,The patient's visual acuity was significantly better than before, and no blurred vision.