Maybe the name is easy to misunderstand, many people think that farsightedness is clear at a distance and unclear at a distance, but it is not true. In orthoptic eyes, that is, eyes that see clearly both near and far, parallel rays of light enter the eye and focus on the retina to form a clear image; while in hyperopic eyes, parallel rays of light enter the eye and do not focus on the retina, but rather, after focusing on the retina, they need to focus on the retina with the help of a convex lens to concentrate the light in order to focus on the retina, so as to be able to see a clear image of the object. In layman’s terms, farsightedness is actually the inability to see clearly both near and far. Why are people farsighted? In most cases, farsightedness is due to the small size of the eyeball and the short anterior and posterior diameters of the eye, or what is known medically as the short axial length of the eye. This eyeball small and we usually say small eyes is not the same, we usually say small eyes big eyes actually refers to the gap between the upper and lower eyelids (medically known as the eyelid fissure) size, part of the small eyeballs eyelid fissure is small, but the two do not correspond to each other. Just as there is a difference between short and tall people, there is also a difference between the length of the eye axis, especially short eyeballs, medically known as small eyeballs. Small eyeballs are characterized by hyperopia or even high hyperopia. People grow up, gradually grow taller, the eyes also have a process of growth, early life, everyone is farsighted. Early in life, everyone is farsighted. The eyeballs grow vigorously when they are born, and the process of visualization is completed at the age of about 8 years. So there is a process of vision development in children. So does everyone become emmetropic around the age of 8? No. There are still a lot of people who have small eyeballs and are farsighted and need convex lenses to see clearly, and some people may also have strabismus and amblyopia induced by farsightedness. Some people, although farsighted, can use the ciliary muscle to focus and get clear vision for distance and near. Such a condition is classified as hidden hyperopia. Orthokeratology eyes look away when the eyes are in a relaxed state, not tired, just look close when the ciliary muscle needs to focus, and farsightedness, look away when the ciliary muscle needs to focus, look close when the ciliary muscle to pay more effort, a simple analogy, orthokeratology eyes look at things, the ciliary muscle run stop, often have a break, and farsightedness eyes look at things, the ciliary muscle has been running non-stop, so it is easy to appear visual fatigue. Hyperopia patients, not only visual fatigue, but also eye pain, brow arch swelling, headache, insomnia, memory loss and other symptoms of regulatory fatigue. So, can hyperopia be treated? For adolescents with hyperopia, the ciliary paralyzing muscles are used to eliminate the regulation and then optometry is used. As an adult, hyperopia can be treated with eye fittings or by laser surgery, just like myopic laser surgery.