Blurred vision, also known as blurred vision, may be non-pathologic, but can also be caused by a variety of eye diseases, such as cataract, myopia, astigmatism and so on. 1. Non-pathological causes: e.g. eye fatigue, bright light exposure, etc. 2. Cataract: refers to the decrease in transparency or color change of the lens, which makes the eyes unable to see the surrounding objects, with the symptoms of progressive vision loss and double vision. 3. Myopia: When the eye is relaxed, parallel light rays are focused in front of the retina, and the vision of distant objects is blurred. The main manifestation is a decrease in distance vision but normal near vision, and easy to experience visual fatigue. 4. Astigmatism: It is a kind of eye disease with abnormal refraction, mostly related to the curvature of cornea. Symptoms are blurred vision, visual fatigue, vision loss and so on. There are many reasons for blurred vision, and there may be other reasons as well. When the symptoms still cannot be relieved after resting and relaxing the eyes, it is recommended to consult a doctor as soon as possible to clarify the cause and follow the doctor’s instructions.