There is no clinically established time how long after surgery a cataract can be vaccinated with the new crown vaccine, usually after 4 to 6 weeks, but the exact time is related to the patient’s recovery. The occurrence of cataracts is related to the metabolic disorder of the lens inside the eye. The body is also in a period of weakness after cataract surgery and may experience postoperative stress, leading to a non-infectious inflammatory response. Generally, after an interval of 4 to 6 weeks after the completion of the surgery, there is no discomfort in the body, and the new crown vaccine can be administered. However, it should be noted that after cataract surgery, when the patient is unwell or has postoperative complications, such as endophthalmitis, the new crown vaccine should be withheld to avoid adverse reactions. Post-cataract surgery patients are advised to have regular check-ups and receive the New Crown vaccine under the advice of their doctors.