The human eye has a blind spot on the retina, meaning there are no image sensors(rods and/or cones) in this region. This is the place where image gets transferred to the brain using optic nerves. To realize this blind spot, draw a cross and a circle at two distinct ends on a piece of paper respectively. Now, close your one eye and move back and forth while continuously focusing on the cross. At a certain point, the circle disappears from your vision and this is because the circle’s image was formed at the location of your blind spot. If you further continue moving in the direction you were already moving, the circle appears again.
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