Photoreceptor Cells, VertebrateRetinaPhotoreceptor CellsPhotoreceptor Cells, InvertebrateRetinal Cone Photoreceptor CellsRetinal DegenerationLightRod OpsinsRhodopsinEye ProteinsElectroretinographyRetinal Photoreceptor Cell Outer SegmentRod Cell Outer SegmentPhotoreceptor Connecting CiliumLight Signal TransductionDark AdaptationPhotoreceptors, PlantOpsinsVision, OcularRetinitis PigmentosaRetinal PigmentsPhotoreceptors, MicrobialArrestinCyclic Nucleotide Phosphodiesterases, Type 6TransducinAdaptation, OcularPigment Epithelium of EyeDarknessFluorescent Antibody Technique, IndirectEyeCryptochromesRadiation Injuries, ExperimentalPhytochromeHorseshoe CrabsRetinal Pigment EpitheliumPeripherinsRetinal Photoreceptor Cell Inner SegmentCone OpsinsDrosophila ProteinsRecoverinAnimals, Genetically ModifiedRetinal Bipolar CellsCompound Eye, ArthropodRats, Mutant Strains3',5'-Cyclic-GMP PhosphodiesterasesRetinaldehydePhotic StimulationRetinal DiseasesUrodelaRetinal Horizontal CellsGuanylate Cyclase-Activating ProteinsMicrospectrophotometryDrosophilaG-Protein-Coupled Receptor Kinase 1Retinal Detachmentcis-trans-IsomerasesThoracicaRetinal Neurons