The majority of amblyopia is caused by hyperopia, as you can clearly see from the above diagram, external objects are imaged behind the retina (commonly known as the fundus) in the hyperopic eye, and light cannot be focused on the retina. Wearing glasses to treat amblyopia is the principle that glasses can change the focus of an object in the eye, moving the focus away from the retina to the retina. After the light is focused on the retina, the retina is stimulated by the light and gradually develops, so the vision will gradually improve, and this is the principle of using glasses to treat amblyopia. Wearing glasses is the only scientific and effective way to treat amblyopia. For amblyopia, glasses are medicine, optical medicine. If you understand this, you will be able to identify what is the correct method of amblyopia treatment. How can the different degrees of hyperopia be seen in the picture above? The focal point behind the retina is farther away from the retina (also known as the fundus), which means the higher the degree of hyperopia, the more blurred the eye is, the more amblyopia is formed, and the greater the degree of glasses used to correct hyperopia, and the greater the degree the lenses are, the thicker the lenses are, which is why highly hyperopic children tend to wear thicker glasses. This chart also explains when you can take off your glasses and see clearly. The first condition is that the amblyopia must be cured, that is, the vision must be normal, that is, the fundus development has reached normal after the treatment by wearing glasses. Second, the degree of hyperopia gradually reduced to about one hundred degrees. From the above farsighted eye diagram can be seen, the lower the focal point of farsightedness is closer to the retina, the better the vision without glasses, and when the focal point just falls on the retina is when the glasses can be removed to see clearly. So why is it that if you lower your farsightedness to 100 degrees, you can see clearly without glasses? Because the lens of children have the ability to adjust to three hundred degrees, through the lens of the adjustment effect can easily be one hundred degrees of farsighted imaging in the retina after the focal point to the retina to move forward, even without glasses can see clearly outside objects. The above explanation is actually the application of physical optics to the eye, and it is relatively easy for parents with knowledge of physics to understand.