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The Vertebrate Retina: Structure, Function, and Evolution Video Lecture
In this set of video lectures, HHMI Investigator Jeremy Nathans explores the molecular mechanisms within the retina that mediate the first steps in vision. The first lecture focuses on the structure of the light-sensing receptors, the intracellular signals that are triggered by light absorption, and the ways in which the retina extracts information from a complex scene. In Part 1a, Dr. Nathans uses several optical illusions to further explain how the vertebrate eye functions. Human color vision is the focus of Part 2. Dr. Nathans begins with Newton’s prism experiments and moves forward to describe the genetic basis for normal color vision and the common variations. These segments are appropriate for undergraduate or graduate students of cell biology or neuroscience and medical students. In Part 3, the speaker describes recent work on the evolution of trichromatic color vision, showing how differences in the color vision of New and Old World primates illuminates the evolution of trichromatic color vision in humans. Part 3 is suitable for cell biology or neuroscience undergraduate and graduate students. Teaching tools include the lecture transcript, nine short video clips and descriptions, lecture notes, review and facilitator questions, a feature called “Explain/teach these concepts to a friend,” and recommended reading. To view answers to the review and facilitator questions, educators must register on the site as teachers. Users studying on their own should send an email to ibioseminars@cmp.ucsf.edu with a request for the answers. This seminar is featured at iBioSeminars, which offers a series of free video talks by leading biologists, with accompanying educational materials.