GlassOptical IllusionsNerve FibersDietary FiberMuscle Fibers, SkeletalFixation, OcularGlass Ionomer CementsModels, PsychologicalMineral FibersPsychophysicsContrast SensitivityMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchPattern Recognition, VisualCotton FiberLightStress FibersPurkinje FibersPhotic StimulationNerve Fibers, Myelinated