In Chapter 2, we discussed much of the physiology involved in visual perception (or, at least, in the beginning of the visual perception process). We talked about parts of the eye (and their functions), how focusing of light occurs, transduction, and many similarities and differences between your rods and cones (such as the rate and extent to which each type of receptor adapts in the dark). Pick one thing that you learned from this lecture that surprised you or fascinated you. Explain.