Lung cancer usually does not show obvious manifestations in eyes, if patients have eye discomfort, they need to find out the cause in time. Lung cancer may be caused by smoking, air pollution, ionizing radiation, diet, heredity and other factors. Typical symptoms of lung cancer are cough, chest pain, blood in sputum, hemoptysis, dyspnea, hoarseness, etc. Generally, it does not show obvious discomfort in the eyes. If the patient’s eyes have abnormal discomfort, he/she should be alerted to other diseases. Eye discomfort may be caused by physiological factors such as overexertion and overuse of eyes, or it may be caused by diseases such as conjunctivitis, keratitis and trichiasis. If patients with lung cancer experience eye discomfort, they should report to doctors in time and have relevant examination to clarify the cause of the disease. Patients with lung cancer need to take standardized treatment measures, and if eye discomfort occurs, they should identify the cause and take relevant treatment measures actively to avoid delaying the condition. In daily life, patients should keep their eyes clean and avoid rubbing both eyes to avoid secondary infection.