title: [The astigmatism bioblique. II. Mathematical description (author's transl)].
abstract: Optical surface showing an astigmatism bioblique could only approximately be described by mathematical formulas. The best approximation is that one which shows a close relation between regular and bioblique astigmatism. It allows the calculation of the best correcting cylinder, which brings the anavoidable residual astigmatism to a minimum.
mesh_terms: D001251:Astigmatism / Q000503:physiopathology*; D008433:Mathematics; D055095:Optics and Photonics; D012029:Refraction, Ocular
vernacular_title: Zum Astigmatismus biobliquus. II. Mathematische Analyse