MelatoninDarknessReceptors, MelatoninReceptor, Melatonin, MT1Receptor, Melatonin, MT2Pineal GlandCircadian RhythmLightPhotoperiodArylalkylamine N-AcetyltransferaseAcetylserotonin O-MethyltransferaseTryptaminesDark AdaptationChronobiology DisordersSuprachiasmatic NucleusPhotoreceptor CellsLightingRetinaKynuramineBiological ClocksPeriodicitySleepPeriod Circadian ProteinsAntioxidantsSeasonsPhotic StimulationReflex, Vestibulo-OcularAdaptation, OcularSleep Disorders, Circadian RhythmPhodopusCavesPerchesCircadian ClocksPhytochromeCryptochromesNystagmus, PhysiologicVision, OcularRetinal Rod Photoreceptor CellsTime FactorsChlorophyll5-MethoxytryptamineDiuronARNTL Transcription FactorsDrug ImplantsRetinal Cone Photoreceptor CellsEye MovementsRats, WistarReproductionWakefulnessCLOCK ProteinsPupilVestibule, LabyrinthOcular Physiological Phenomena