Farsightedness is defined as parallel rays of light at infinite distance, refracted by the refractive system of the eye with the eye adjusted at rest, whose converging focus is located behind the retina. Most of the etiologies of hyperopia are physiological. One is axial, since the infant is just born, our eye is relatively small, the eye axis is short, and the refractive state of the eye is in hyperopia. As the infant’s body develops, the eyeball gradually becomes larger and the eye axis gradually grows, and for every millimeter of growth in the eye axis, the refractive power of the eye increases by 300 degrees, so as the infant grows older and the body develops, the refractive state of our eyes gradually changes from hyperopia to orthopia (no refractive error) and the vision gradually improves. Normally, our eyes develop orthophoria around the age of 14 or 15. However, in some children, the eye develops more slowly and the eye axis is shorter than normal, so the hyperopia will be higher than normal, affecting visual development and even causing amblyopia. Another kind is curvature, which refers to the lower curvature of the refractive medium of the eye (mainly the cornea and lens), i.e., the surface of the refractive medium is flatter and has a smaller amplitude, and the refractive index of light becomes lower. There is also exponential, which refers to the refractive power of the refractive medium of the eye becomes lower, mainly occurs in the lens, and is mostly pathological. In short, farsightedness requires timely visits to the hospital for an optometric examination and, if necessary, correction with lenses.