THERE’S ACTUALLY A BLIND SPOT IN OUR VISION, BUT OUR BRAIN FILLS THE GAP.
The blind spot is a very common phenomenon among vertebrates. It is because the light-detecting photoreceptor cells are absent in the area where the optic nerve passes through the retina. Because of that, the corresponding field of vision becomes invisible as no light is detected from there by our eyes. The phenomenon was first discovered in the 1600s by Edme Mariotte in France. Until then, the point where the optic nerve enters the eye was thought to be the most photosensitive part of the eye.
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