Why We See What We Do - Professor William Ayliffe FRCS

The visual system has developed to allow us to navigate in a complex and dangerous world in order to find food and to avoid danger. This survival system works by building a complex three-dimensional model based on two-dimensional data from the retina. This model is tested against "reality" and checked with information from other senses and updated if needed. The brain suppresses the complexity of this processing and we believe that vision is instantaneous, real and effortless. But is seeing just an illusion? All our lectures are available for free download from the Gresham College website, in video, audio or text formats: http://www.gresham.ac.uk Gresham College professors and guest speakers have been giving free public lectures in central London since 1597. This tradition continues today and you can attend any of our lectures, or watch or listen to them on our website. Website: http://www.gresham.ac.uk Twitter: http://twitter.com/GreshamCollege Facebook: http://www.facebook.com/pages/Gresham-College/14011689941

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Gresham College exists for the sole purpose of disseminating knowledge to the public through free lectures. This four century old tradition continues today with three or more lectures a week being made available for free download from our website: