The sliding lens paradox or the unexpected effect of longitudinal ("to-and-fro") motion of plus spectacle lenses. A treatise on lens effectivity.
D000065:Accommodation, Ocular; D005139:Eyeglasses; D006801:Humans; D008433:Mathematics; D009216:Myopia / Q000503:physiopathology; D055095:Optics and Photonics; D012029:Refraction, Ocular