Blurry eyes may be due to overuse of eyes or refractive error, cataract and other eye diseases, you need to go to the ophthalmology department to improve the examination and targeted treatment. 1. Excessive use of the eyes: If you use your eyes too much because of long hours of reading, playing the cell phone, using the computer and so on, blurring occurs. In this case, you need to look into the distance to relax the eye muscles, do eye exercises every day, avoid prolonged use of the eyes can effectively alleviate the blurred eyes. 2. Refractive error: myopia, astigmatism and other refractive errors can affect normal vision, resulting in blurred eyes, the need for timely medical correction. 3. Cataracts: Cataracts can manifest as blurred vision, which may be accompanied by diplopia, visual field defects, color vision changes, refractive changes and other discomforts. In this case, it is necessary to improve the eye examination, and after a clear diagnosis, surgical treatment is feasible. After surgery, vision can be normalized. If the blurred vision cannot be relieved by resting for a long time, it is recommended to go to the ophthalmology department for examination in time to avoid delaying the condition.