The inability to focus the eyes to see things blurred may be caused by refractive errors, psychological disorders, visual fatigue and other reasons. 1. Refractive error: Refractive error includes myopia, hyperopia and astigmatism, which can cause patients’ eyes to be unable to focus and see things blurred. Patients should go to the ophthalmology department of the hospital in a timely manner, improve the visual acuity, optometry examination, and follow the doctor’s instructions to wear glasses or surgery to correct and improve vision. 2. Mental illness: If patients have long-term stress, poor sleep, anxiety, etc., it will cause patients to lose focus and gaze, patients should improve their life status, active sports, while maintaining a good state of mind, and seek medical help when necessary. 3. Visual fatigue: patients who use their eyes for a long time, resulting in dryness, soreness and swelling of the eyes, can appear the eyes can not focus to see things blurred and other discomforts. You can relieve the discomfort by gazing into the distance, resting with eyes closed, massaging around the eyes, etc., or use eye drops to relieve the symptoms as prescribed by the doctor. If you find that the eyes can not focus to see things blurred, you need to consult a doctor in a timely manner, improve the examination, a clear diagnosis, under the guidance of the doctor to carry out professional treatment, to avoid the adverse consequences of self-medication.