ColorColor PerceptionColor VisionColor Perception TestsUltrasonography, Doppler, ColorColor Vision DefectsHair ColorEye ColorPigmentationEchocardiography, Doppler, ColorProsthesis ColoringColorimetrySkin PigmentationLightingPhotic StimulationRetinal Cone Photoreceptor CellsFeathersContrast SensitivityPigments, BiologicalPsychophysicsReceptor, Melanocortin, Type 1ButterfliesDiacylglycerol O-AcyltransferasePhotographyLightPattern Recognition, VisualRetinal PigmentsSensory ThresholdsSpectrophotometryFood PackagingOperating TablesDiscrimination (Psychology)Food Coloring AgentsBlood Flow VelocityDental PolishingAdaptation, OcularForm PerceptionAgouti Signaling ProteinMelaninsSpinal Cord StimulationIsosorbideTooth DiscolorationOpsinsFood TechnologyAttentionVisual PerceptionUltrasonography, Doppler, PulsedImmersionDental MaterialsOptical IllusionsNatureViscaceaeReproducibility of ResultsCuesMotion PerceptionTime FactorsComposite ResinsReaction TimeAfterimageImage Processing, Computer-AssistedMaterials TestingAcrylic ResinsCichlidsBeesVisual PathwaysPhenotypeMaxillofacial ProsthesisFundus OculiColoring AgentsTooth, ArtificialVision, OcularVisual FieldsMicrospectrophotometryRod OpsinsTooth BleachingPerceptual Closure