Leonardo da Vinci may have had a squint, according to new research by an art historian. A study by Dr Christopher W. Tyler of City University, London, argues that Leonardo may have had a form of strabismus, with a tendency for one eye to turn outward. It said this may have actually been an advantage for artistic purposes and contributed to the depth of his works.Strabismus doesn't broaden your visual field. When the two eyes disagree, the brain picks one and uses it. People with lazy eye have less depth perception in some unusual circumstances.... but in fact parallax doesn't account for most of our depth perception. We perceive the whole scene based on knowledge and anticipation. Lack of parallax only makes a difference in abnormal and unanticipated scenes like the Ames Room, where strabismus is NOT fooled by the illusion. In other words, it doesn't make a damn bit of difference. Vision is mostly in the brain, and the brain factors out all sorts of physical constraints.
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