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Straight lines
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1. Orbison illusion
This illusion was discovered by the American psychologist William Orbison (1939).
2. Wundts illusion
This illusion was discovered by the German psychologist Wilhelm Wundt (19th century).
3. Hering illusion
Similar illusions
Demo 1.0.A:
Demo 1.0.B:
Blue lines appear as if they are bowed outwards. Compare it with Spine Illusion 1.0.J, [link]
Demo 1.1.A:
Demo 1.2.A:
Demo 1.3.A:
Demo 1.0.B:
Demo 1.1.B:
Demo 1.2.B:
Demo 1.0.A:
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