Is 4.5 serious?

Normal people's vision is about 5.0, so vision 4.5 means that only half of the eye chart can be seen clearly. The degree of damage to vision is not light, but it depends on the cause of vision damage. If refractive factors, especially myopia caused by vision decline, may not be very serious, about 100-200 degrees of myopia range. If the refractive problem caused by high degree hyperopia or astigmatism, may need to wear high degree glasses, and children may also be combined with a certain amblyopia, need amblyopia treatment and training can be. If not refractive factors can be corrected, it can not be corrected by wearing glasses, there may be certain organic lesions, such as cataracts or macular degeneration. It can cause the decline of vision, and the initial decline of vision may also be around 4.5. This situation needs to be paid attention to, and active examination is needed to clarify the cause, such as cataract or fundus lesions, and surgery may be needed to completely correct vision.