Parts of the visual system and the motor control can be explained by an additional stage in the evolution of the eye and the evolution of the brain. Today, in the visual system the left visual field is represented in the right hemisphere and the right visual field in the left hemisphere. Furthermore, the visual fields are represented upside down in the brain. The physical cause is only the change from a convex eye that is turned to the environment, like an insect eye, to a retracted, concave retina (Figure 1 and 2).* In addition, the right hemisphere controls the left part of the body, and the left hemisphere controls the right part of the body. These circumstances are caused by evolution, protection of the retina and maintenance of motor control and self defense after injury on the injure
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