WEBVTT

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How can a message be sent specifically to one of the hemispheres of the brain?

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Quite simply, anything presented to the right visual field - in this case, the banana -

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falls on the left half of the retina in both eyes and is passed to the left hemisphere.

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Inversely, anything presented to the left visual field - the beach ball - is passed to the right hemisphere.

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Of course, if you focused your eyes directly on the beach ball, the image, the image of the ball would go to both hemispheres.

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To compensate for this, images can be flashed briefly and then removed.

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The person doesn't have time to move the eyes, so the information from each visual field will go to only one hemisphere.