If there is 400 degrees of myopia in the eyes, it will definitely cause a significant loss of vision, and the picture seen by this myopia is very blurred. If you see lights, there will be a doughnut-shaped band of light, and you can’t see the specific light bulb. If you look at textbooks, you can’t see clearly after more than 40cm, so myopia still has a very big impact on normal life or learning. Therefore, for myopia, it is recommended to go to the hospital as soon as possible for an optometric examination to clarify the exact degree and to wear glasses early to improve vision. If you don’t want to wear frame glasses, you can also choose to use corneal contact lenses to correct, which is commonly known as contact lenses, including soft corneal contact lenses and hard corneal contact lenses, or if you are an adult, you can use surgery to correct.