Vision 0.5 and 0.6 degrees?

Vision 0.5 and 0.6 is how many degrees? Normal people's eyes are parallel light after refraction through the eye's refractive system imaging on the retina can see objects, normal vision is 1.0. The current description of vision 0.6 and 0.5 indicates that vision has declined, the specific number of degrees to be measured by computer refraction, but also try to wear glasses, evaluate the degree of the eyes, wearing vision can reach 1.0. So judge 0.5 and 0.6, this evaluation method is not able to measure the degree of wearing glasses, it is recommended to go to the hospital for computer optometry. If the patient needs glasses, he needs to do comprehensive optometry to measure the accurate degree.