EntityQ690182· pop 37· linked from 567 articlescontrastSign in to savedifference in luminance and/or color that makes objects visually distinguishableConnectionsWeber–Fechner lawEntitycolorEntityAlzheimer's diseaseEntitystrokeEntityopticsEntityQ455EntityimageEntitydigital object identifierEntityInternational Standard Serial NumberEntityvisual perceptionEntityophthalmologyEntitycataractEntityglaucomaEntityadaptationEntitycolor blindnessEntityretinaEntitypixelEntityQ180686EntitybibcodeEntityamblyopiaEntityCategoriesDimensionless numbersPhotometryVision