The patient sees object images as much smaller than they are. This can be a form of perceptual syndrome, or delusion, and is mostly seen in ocular vascular disorders or as an ocular symptom of central nervous system disorders. The cause and mechanism of the illusion of seeing objects as smaller is unknown and may be related to personality factors or may be a reflection of pathological changes in the personality itself. It may be a reflection of personality changes. It is often seen as an ocular symptom of ocular vascular disease or central nervous system disease. Optic nerve atrophy is a degenerative disease of the optic nerve, mostly caused by the advanced stages of diseases such as high wind cataracts, blindness, and blue wind cataracts. Therefore, treating the primary disease and avoiding deterioration is the main preventive method. Through drug treatment. However, there is no good treatment, the best treatment is to combine with psychotherapy, and actively treat the primary disease. Avoid head trauma and falls, actively treat hypertension, diabetes and other underlying diseases.