Cone OpsinsOpsinsRod OpsinsRetinal Cone Photoreceptor CellsDrug Inverse AgonismRetinal Rod Photoreceptor CellsPhotoreceptor Cells, VertebrateTransducinRetinaldehydecis-trans-IsomerasesVision, OcularRetinal PigmentsRhodopsinGrowth ConesRetinaEye ProteinsMicrospectrophotometryLight Signal TransductionPhotoreceptor CellsColor VisionCompound Eye, ArthropodDark AdaptationElectroretinographyHydrozoaPhylogenyLightPhotoreceptor Cells, Invertebrate