Retinal Photoreceptor Cell Outer SegmentPhotoreceptor Cells, VertebratePhotoreceptor CellsRod Cell Outer SegmentRetinaRecoverinEye ProteinsPineal GlandPhotoreceptor Cells, InvertebrateRetinal Photoreceptor Cell Inner SegmentRetinal DegenerationRetinal Cone Photoreceptor CellsRhodopsinRod OpsinsRetinal Rod Photoreceptor CellsLightElectroretinographyRetinal PigmentsDark AdaptationTransducinRetinitis PigmentosaVision, OcularLight Signal TransductionPigment Epithelium of EyeHippocalcinCyclic Nucleotide Phosphodiesterases, Type 6