title: [New spectacle lenses with variable progressive refractive power (author's transl)].
abstract: Spectacle lenses with variable optic power are indeed no replacement but are an interesting addition to the group of visual aids for correcting presbyopic patients. Since the first commericial lenses of this kind appeared in the year 1959, further sorts of glass with variable properties have been developed. These were evaluated and compared with each other.
mesh_terms: D005139:Eyeglasses; D005860:Germany, West; D006801:Humans; D007909:Lenses / Q000592:standards*; D055095:Optics and Photonics
vernacular_title: Neuere Brillengläser mit gleitender (progressiver) optischer Wirkung.