Focus on understanding how visual systems adapt to an animal's requirement. About a third of the course will focus on understanding the evolutionary processes that shape the visual system. The remaining 2/3 will focus on understanding the neural processes underlying vision. A comparative approach-- comparing invertebrate vs. vertebrate vision will be used to highlight different ways in which visual information is processed. Introduction of methods used to study vision (and brain function) from "single molecules to whole organism." Prereq: Biology 201L or 202L and one course in Neurosciences. Not open to students who have taken Biology/Neuroscience 521S. One course.