Eye fatigue may be caused by environmental factors, refractive error, chronic conjunctivitis and other factors. 1. Environmental factors: insufficient light or too much light in the eye environment can cause uneven distribution of light in the eye, reflections and other factors, all of which can lead to eye fatigue. 2. Refractive error: If the patient has myopia, hyperopia, astigmatism and other refractive errors, it can cause eye muscle regulation decline, which can also cause eye fatigue. 3. Chronic conjunctivitis: Mild chronic conjunctivitis may cause symptoms such as itchy, dry eyes and foreign body sensation, which may cause eye fatigue. It is recommended that patients develop good eye habits in daily life, and if discomfort occurs, it is recommended to go to the ophthalmology department of a regular hospital for consultation.