Most of the hyperopia is caused by the shortening of the anterior-posterior diameter of the eye axis, or the weakening of the refractive ability of the eyeball, which causes the light rays that were originally focused on the retina through the refractive system to be deflected and fall at the back of the retina. 1. Shortening of the anterior and posterior axial diameter of the eye: The length of the anterior and posterior axial diameter of the eye is about 24 millimeters in a normal person, and if it is less than this value, axial hyperopia can be caused. The causes of axial hyperopia are mainly physiological and pathological. The former mainly occurs in infancy and young children, and can disappear gradually with the growth of infants and young children and the gradual increase of the length of the eye axis; the latter may be caused by diseases such as ocular dysplasia or ocular tumors. 2. Decreased refractive power of the eye: There are many reasons for decreased refractive power of the eye, mainly including refractive index abnormality, lens agenesis, lens position backward shift and refractive media curvature abnormality, etc. After the appearance of hyperopia, it should be promptly treated. When hyperopia occurs, you should go to the hospital in time for examination, make a clear diagnosis and carry out targeted treatment as soon as possible to avoid delaying the condition, in order to prevent the worsening of vision loss and causing other eye problems.