title: Optical magnification for subnormal vision: historical survey.
mesh_terms: D005139:Eyeglasses / Q000266:history; D049673:History, 20th Century; D006801:Humans; D007909:Lenses / Q000266:history*; D055095:Optics and Photonics / Q000266:history; D014786:Vision Disorders / Q000628:therapy*; D014787:Vision Tests; D014792:Visual Acuity