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Blind Spots
You don't have any rods or cones where the optic nerve connects to your
retina. In your eye where the optic nerve connects, you have a
 Set yourself about 8 inches from the monitor. Cover your left eye; look at the cross. Keep looking at the cross and move slowly forward and backward. Don't move your eyes. At some point the circle will disappear from your vision. You've found your blind spot. Now, uncross your eyes and take a look at how animals see. |