Patients with clear vision at near and double vision at far may be caused by refractive error, cataract, visual fatigue and so on. 1. Refractive error: patients who have clear vision at near and double shadows at far are mostly caused by myopia, which may be related to patients’ prolonged close-distance use of eyes or excessive use of electronic products and other factors. Myopic patients can wear glasses to correct myopia and improve their vision. 2. Cataract: The uneven clouding of the lens in cataract patients can lead to the aggravation of myopia, and patients can improve their vision through surgical treatment, such as cataract ultrasonic emulsification combined with IOL implantation. 3. Visual fatigue: If patients stay up late or use electronic products for a long time, it may cause visual fatigue, because the ciliary muscle spasm, which can have a certain impact on the patient’s vision, resulting in blurred vision. It is recommended that patients who have clear vision and blurred vision at a distance with other discomforts should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.