Drinking green tea has not been found to have a brightening effect, i.e., to improve eyesight; green tea is a beverage and does not improve the eyesight of those who drink it. Green tea is one of the main types of tea in China, it contains more tea polyphenols and caffeine, also contains vitamins and a large number of trace elements. Drinking green tea can help quench your thirst and replenish vitamins and trace elements. However, green tea is not a medicine, drinking green tea can not achieve the effect of improving eyesight. Patients with vision loss can find out the cause of the disease, if it is caused by myopia, you can wear glasses to correct myopia and improve vision. If it is caused by cataract, surgical treatment is feasible, such as cataract ultrasonic emulsification combined with IOL implantation. It is recommended that patients with vision loss should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.