Corrected vision is the visual acuity obtained after correcting refractive errors with glasses, as opposed to naked eye vision, which is the actual visual acuity. The result is called corrected visual acuity, which is obtained after wearing a mirror for vision loss through a convex or concave lens to correct vision. The visual acuity of a normal person without glasses is called naked eye vision. If the visual acuity of the naked eye does not reach 1.0, optometry is required, and often dilated optometry is required for adolescents. If you are nearsighted, you will need a concave lens to correct your vision to 1.0 or higher. If the eye is farsighted, it needs to be corrected with convex lenses to make the vision reach 1.0 or more. Astigmatism is also corrected by wearing glasses, so the vision with glasses is called corrected vision.