The Eye: Window to the World

ability angle appear artist believed blind blood blue body bottom brain called cataracts cause cells century color cones containing cornea cortex created cues dark depth developed device direction disease distance edge effect experiment eye's fibers field fire fluid focus ganglion gives glass glucose green horizontal human illusion impulses iris known later layer lens lenses light lines look mind moon motion move movement muscles nature nerve neurons Newton normal objects observer operation optic optic nerve painting pass patient's pattern perceived perception photoreceptors physician picture pigment produce rays reach refractive remains removed researchers respond result retina rods scene scientific scientists sense sensitive shape sight signals simple space surface surgeon takes theory tion tissue turn vision visual vitreous waves yellow Young