title: [Contrast vision-definitions, conversions, and equivalence tables].
abstract: Human contrast vision and its quantitative assessment are gaining more attention. Publications on this topic can be confusing due to the overabundance of differing definitions and quantification of contrast vision. As a case in point, in Germany, contrast ratios as required for certain driving licenses and the DIN-defined contrast ratio are reciprocal. In this article, the five most important definitions of luminance contrast and contrast vision (Michelson, Weber, contrast ratios, logCS) are presented. We detail the specific domains for them, give formulae to convert between all of them and provide a table with equivalent values. We recommend the unit logCS wherever possible.
authors: Klinik für Augenheilkunde, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland. michael.bach@uni-freiburg.de.|Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Freiburg, Deutschland. michael.bach@uni-freiburg.de.
authors: M
authors: M
authors: Bach
authors: Klinik für Augenheilkunde, Otto-von-Guericke-Universität Magdeburg, Magdeburg, Deutschland.|Center for Behavioral Brain Sciences, Magdeburg, Deutschland.
authors: M B
authors: MB
authors: Hoffmann
authors: Klinik und Poliklinik für Augenheilkunde, Universität Regensburg, Regensburg, Deutschland.
authors: H
authors: H
authors: Jägle
authors: Klinik für Augenheilkunde, Universitätsklinikum Freiburg, Killianstr. 5, 79106, Freiburg, Deutschland.|Medizinische Fakultät, Albert-Ludwigs-Universität Freiburg, Freiburg, Deutschland.
authors: S P
authors: SP
authors: Heinrich
authors: Kompetenzzentrum "Vision Research", Studiengang Augenoptik, Hochschule Aalen, Aalen, Deutschland.|Universitäts-Augenklinik Tübingen, Tübingen, Deutschland.|Forschungsinstitut für Ophthalmologie, Universität Tübingen, Tübingen, Deutschland.
authors: U
authors: U
authors: Schiefer
authors: , Köln, Deutschland.
authors: W
authors: W
authors: Wesemann
mesh_terms: D000465:Algorithms; D015350:Contrast Sensitivity; D005858:Germany; D017410:Practice Guidelines as Topic; D012016:Reference Values; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D009626:Terminology as Topic; D014177:Translations; D014787:Vision Tests / Q000592:standards*; D014785:Vision, Ocular
keywords: Contrast; Contrast sensitivity; LogCS; Michaelson contrast; Weber contrast