How much is normal vision for four-year-olds?

Four years old children normal vision is how much? Four years old children normal vision is between 0.5 and 0.6. If four years old children optometry words should exist 100 to 150 degrees of hyperopia, belong to physiological hyperopia, this is the normal refractive state of four years old children. Children to three or four years old must be taken to the hospital for mydriasis optometry, comprehensive optometry, vision examination. If vision is less than 0.5, consider whether there is amblyopia, according to the degree of optometry out with glasses. Amblyopia training, there are cover treatment, as well as visual function training, eye position training, according to the specific conditions of the examination to make further treatment. General children to the hospital every six months for vision examination, optometry examination. Usually also pay attention to eye protection, reduce the use of mobile phones, computers, watching TV to sit five meters away, do not let the eyes too tired.