在某些情况下，眼睛的解剖结构（感受野）会造成视错觉。然而，在大多数情况下，大脑（对所感知场景的解读）才是造成视错觉的 "罪魁祸首"。在这种情况下，大脑的预处理能力被证明是一个 "缺点"。
Optical illusions can occur due to the anatomy of the eye in some cases (receptive fields). However, in most cases, the brain (interpretation of the perceived scene) is the one "at fault" for an optical illusion. In this instance, the brain's preprocessing ability proves to be a "disadvantage".