4.5 vision is relatively moderate vision, but certainly not normal vision. Normal vision is usually around 5.0, and 4.5 vision is most likely due to a loss of vision caused by myopia. A 4.5 vision is usually about 150 degrees of myopia. Children definitely need to wear glasses, because if they don’t have glasses, one is that it will affect reading the blackboard, which in turn affects learning; secondly, if they don’t wear glasses, it will easily lead to eyestrain, which in turn increases the probability of myopia growth. Adults can consider glasses according to their needs because the prescription has been stabilized. Usually 4.5 vision can be dispensed with if you feel that it does not affect your life. However, if you feel blurry when driving or watching a movie, you can also wear a pair of nearsighted glasses and have them fitted when needed.