Matching Pairs Parts and Functions of the EyeOnline version Match the parts to the functions of the eye. by Jessica Bridges 1 Iris 2 Sclera 3 Optical Nerve 4 Retina 5 Lens 6 Cornea 7 Pupil focuses light and allows you to see opening in the middle of the iris that allows light to enter the eye white part of the eye that protects the eye colored part of the eye that controls the size of the pupil and the amount of light that enters the outermost lens and acts like a window that controls and focuses the entry of light into the eye transfers signals from the retina to the vision centers of the brain tissue that lines the back of the eye socket; receives focused light, converts it to signals, and send signals to the brain