A one-year-old child who often looks at a cell phone and sets the screen to the brightest possible level usually does not cause astigmatism, but it may cause myopia in the long run. Astigmatism usually occurs due to congenital developmental abnormalities, bad eye habits, such as squinting for a long time to see things. Generally watching a bright cell phone screen does not cause astigmatism, but it is also harmful to the health of the child’s eyes, and for a long time, it is easy to lead to the formation of myopia in the baby, which is not conducive to the health of the patient’s eyes. Be sure to let the baby develop good eye habits, minimize the use of computers, television, cell phones and other electronic products time, more let the baby look at some outdoor activities of the object, not only can stimulate the baby’s visual development, but also to protect the eyes to prevent myopia. It is recommended that children with eye discomfort should seek timely medical attention to assess their condition and follow the doctor’s instructions for treatment.