Many things cause geometrical optical illusions, among them are the location of an object in the visual field, whether the extent of an area is filled or empty, contour, contrast and perspective.Having electronic voting machines without a paper trail has got to be the stupidest, most shortsighted or corrupt political decision I have ever heard about. - Pat Holmes
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Chapter 4 - Types Of Geometrical Optical Illusions

Many things cause geometrical optical illusions, among them are the location of an object in the visual field, whether the extent of an area is filled or empty, contour, contrast and perspective.

Many things cause geometrical optical illusions, among them are the location of an object in the visual field, whether the extent of an area is filled or empty, contour, contrast and perspective.

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About This Book Preface Chap 1, Introduction Chap 2, The Eye Chap 3, Vision Chap 4, Geometrical Chap 5, Figures Chap 6, Angles Chap 7, Depth/Distance Chap 8 Brightness/Contrast Chap 9, Color Chap 10, Lighting Chap 11, Nature Chap 12, Painting/Decorating Chap 13, Architecture Chap 14, Magic Mirror Chap 15, Camouflage

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