Optical illusions show how you see, by Beau Lotto.
To my notion this talk perfectly completes Oliver Sacks observations. I love Lotto’s view on the world. He stresses that there is no stimuli-inherent information, information or content respectively is the result of an interactive process, expressing a relation. Perceptions are volatile and subject to change depending on the context, one may call it illusions, I won’t. Perceptions do not mirror the real world. Perception/content is determined by context and experience, experience not only limited to our individual life, but to evolution. The senses, Lotto says, are not fragile, and therefore prone to illusions. It is the process of perception that is determined by much more than only a stimuli like light that is processed by our visual organs.