Bill Nye The Science Guy 1 20 -1 -1 251018 0.0 0.0 0 Look no further ... Bill Nye is on the ball - the eyeball. For their small size, your eyes do an important job. By working with your brain, your eyes can tell the difference between thousands of different colors. They can follow a fast-moving hockey puck across the ice. They are even sending messages to your brain about what you're reading right now. Eyes work a lot like a camera. They take in light, focus light, and make images. With help from the brain, your eyes help understand the world around you. Light bouncing into your eye passes through an opening called the pupil. If you look in the mirror, your pupil is the black area in the middle of your eye. The pupil can open or close, depending on the brightness of the light. After passing the pupil, the light is focused onto the back of your eye by the lens, a thin layer of cells. On the back of your eye are special cells called rods and cones that are sensitive to light. These cells send electrical messages to your 26 http://image.tmdb.org/t/p/original/liet78quyNwphWl8GLLgJZ30oeH.jpg 1994-02-11 1994-02-11 false Rabbit Ears Productions Public Broadcasting Service KCTS Television James McKenna Bill Nye Michael Gross Kit Boss Erren Gottlieb Ian G. Saunders Adam Gross Seth Gross Simon Griffith Scott Schaefer Darrel Suto Michael Palleschi Lynn Brunelle 2020-08-23 13:00:58 UNKNOWN BNTSG S01E20 Eyeballs.avi