question: The lens and other parts of the eye work together to focus a real image on what eye structure?
distractor3: cornea
distractor1: iris
distractor2: pupil
correct_answer: retina
support: As just described, the eyes collect and focus visible light. The lens and other structures of the eye work together to focus a real image on the retina. The image is upside-down and reduced in size, as you can see in Figure below . The image reaches the brain as electrical signals that travel through the optic nerve. The brain interprets the signals as shape, color, and brightness. It also interprets the image as though it were right-side up. The brain does this automatically, so what we see is always right-side up. The brain also “tells” us what we are seeing.