LightingLightDarknessPhotoreceptor CellsDark AdaptationPhotochemistryAdaptation, OcularPhotosensitizing AgentsColorPhotic StimulationPhotochemotherapyColor PerceptionRetinaRhodopsinPhotosynthesisChlorophyllOptics and PhotonicsHolographyFluorescenceMicroscopyVision, OcularChloroplastsRetinal PigmentsLensesLasersPhotosystem II Protein ComplexPhotosynthetic Reaction Center Complex ProteinsPupilPhotobiologyColor VisionReflex, PupillaryOcular Physiological PhenomenaPhotobleachingColor Perception TestsRod Cell Outer SegmentBacteriorhodopsinsEquipment DesignRetinal Rod Photoreceptor CellsMoonMicroscopy, FluorescenceEndoscopesHalorhodopsinsPhotolysisBufo marinusPhotometrySpinacia oleraceaOptical PhenomenaPhotophosphorylationRetinal Cone Photoreceptor CellsAminolevulinic AcidTurtlesHalobacteriumForm PerceptionPerchesDiuronPhotochemical ProcessesLight-Harvesting Protein ComplexesContrast SensitivityIndocyanine GreenTomography, OpticalPlastoquinoneColoring AgentsTime FactorsDihematoporphyrin EtherElectroretinographyScattering, RadiationFiber Optic TechnologySpectrum AnalysisRose BengalKineticsSinglet OxygenAmbystomaOptical ProcessesCircadian RhythmCrustaceaSpectrophotometryRetinaldehydeLight Signal TransductionElementary ParticlesImaging, Three-DimensionalNecturus maculosusEquipment Failure AnalysisPhotosystem I Protein ComplexUltraviolet RaysPlantsPhotoreceptor Cells, InvertebrateThylakoidsSemiconductorsRana catesbeianaInfrared RaysTransducinMembrane PotentialsFluorescent DyesStroboscopyPhotoreceptor Cells, VertebrateThoracicaElectron TransportProtochlorophyllideRefractometryMicroscopy, Confocal