26. do you see a CPU or a brain?
To see the 3D image: Bring the image really close to your face (until you touch it with your nose). At this distance, your eyes cannot focus on naturally, but look somewhere behind it the doubling focus. Stay put for a while. Now, slowly push the image away from you, while trying to keep the eyes still on focus. Behold, the 3D made possible by your eyes.