The 1962 cartoon series The Jetsons featured a futuristic nuclear family: father George, mother Jane, and their offspring, Elroy and Judy. In the very first episode, we learn about the Jetson family’s purchase of a housecleaning robot named Rosey.
At first glance, most eyes look the same. There’s a small opening through which light passes. That light goes through the transparent liquid behind the lens and strikes the retina, a thin film of light-sensitive nerve cells that line the back of the eye.