Magnifying power of 2.5 allows you to bring the object into focus when it is 2.5x closer. Need to make a symbolic representation. When you see a calf, you do not look at every spot on the calf. Instead you see an outline. You note that there are spots, maybe not at first.
Film is developed.
This requires alot of information to represent things. Need to take 100million pieces of information and reduce this to a statement, e.g., is that a raging rhino over there. Processing occurs in several places, retina, optic nerve, visual cortex. We'll talk about how. Students see ability to focus more closely.