Lying down and playing cell phone is harmful to the eyes mainly because it is easy to cause visual fatigue, easy to cause myopia and myopia growth. If the patient lying down to play cell phones, especially with the lights off to play cell phones, it is easy because the distance between the phone and the eyes is not stable, as well as the brightness of the cell phone screen and the brightness of the surrounding environment is too large a contrast, but caused by eye fatigue symptoms, the patient’s eyes at this time can be soreness, dryness and other symptoms of discomfort. Lying for a long time to play the cell phone, is also very easy to cause patients to form myopia or myopia growth, especially for teenage patients, the risk will be greater. Patients should develop good eye habits, not only can not lie down to play the phone, but also should strictly control the use of cell phones time. It is recommended that patients with vision loss should seek medical attention to assess their condition and follow the doctor’s instructions for treatment.