PsychophysicsSensory AidsSensory ThresholdsDiscrimination (Psychology)Photic StimulationRefractory Period, PsychologicalVisual PerceptionDifferential ThresholdForm PerceptionMotion PerceptionContrast SensitivityPattern Recognition, VisualVision, LowModels, PsychologicalDepth PerceptionSignal Detection, PsychologicalReadingPerceptual MaskingVisual CortexColor PerceptionVision TestsModels, NeurologicalFixation, OcularOrientationAuditory PerceptionPerceptionVisual PathwaysVision, OcularVision DisparityVisual FieldsCuesAcoustic StimulationVision, BinocularElectroretinographyDiscrimination LearningAttentionReaction TimeVisual Field TestsVisual AcuityMagnetic Resonance ImagingBrain MappingPsychomotor PerformanceTime FactorsNeurons