title: [Subjective determination of ocular refraction. I: Optical principles].
authors.affiliation: friedburgkr@compuserve.de
authors.forename: D
authors.initials: D
authors.lastname: Friedburg
authors.forename: K
authors.initials: K
authors.lastname: Krause
mesh_terms: D005139:Eyeglasses; D006801:Humans; D055095:Optics and Photonics; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis* / Q000628:therapy