Inside a Real Human Eye Ready to see what's behind your vision? Here's a dissected human eye revealing the incredible structures that let you see the world. THE SCLERA (white part): This tough outer layer can withstand significant pressure and provides the attachment site for your extraocular muscles. It's essentially the protective shell of your visual system. EXTRAOCULAR MUSCLES: These six tiny muscles control eye movement with some of the finest motor control in the entire human body. They ma