The most common cause of hyperopia is axial hyperopia, which means that the anterior and posterior axes of the eye are shorter than those of the orthoptic eye. 2, another cause of hyperopia is curvilinear hyperopia, which is formed by the smaller curvature of the surface of any refractive body in the refractive system of the eye, called curvilinear hyperopic cornea. It is the part of the eye that is prone to this change, such as congenital flat cornea or by trauma or by corneal disease caused by the theoretical calculation of the bending radius of the cornea from optics, each increase of 1mm can increase 6D of hyperopia, in this curvature hyperopia eyes only few corneas can remain completely spherical, almost all combined with astigmatism. The third type of hyperopia is called refractive hyperopia, which is caused by the reduced refractive power of the crystal, due to physiological changes that occur in old age and pathological changes caused by the treatment of diabetics; hyperopia can also occur when the crystal is dislocated backwards, which may be caused by congenital abnormalities or eye trauma and eye diseases; in addition, high hyperopia can be caused when the crystal is lacking. It is normal for children with mild hyperopia within three hundred degrees, and if there are no symptoms, it does not need to be treated. After the complete cure of amblyopia, the degree of hyperopia gradually decreases with age until the age of eighteen, so no special treatment is needed until the age of eighteen. Adults within 40 years of age with mild hyperopia and no symptoms do not need glasses or other treatments. If an adult over 40 years of age is farsighted, he or she will have difficulty seeing near due to poorer adjustment than when he or she was younger, and will need to wear glasses when seeing near. If the farsightedness exceeds one hundred and fifty degrees, there will also be significant blurring when looking at the distance, and glasses will be needed for both looking far and near. The eyes are very important to our lives, so in normal times we must protect our eyes from a little damage, some people will have farsightedness, the situation does not appear too anxious, as long as we carry out the appropriate treatment can be cured, we must ensure that we do not let our eyes produce excessive fatigue.