Science Experiments with Vision

Do you have any science experiments that my children can try where they learn more about their vision? - Curious
Answer: Try these experiments for your children to learn more about how their eyes work. Help younger children with this experiment.
Experiment No. 1: Your children will learn about the blind spot. It's the area on the retina where there are no light receptors. Have them draw a small circle about 3 inches from a small cross on a piece of paper. They should close their left eye and stare at the circle from about 20 inches away. As they bring the paper closer, the cross will disappear from sight. This happens when the cross falls on the blind spot of their retina. Have them repeat the experiment by closing their right eye.
Experiment No. 2: Your children will learn about afterimage. It is what our eyes continue to see after we have stopped looking at an object. Cut a 3-by-5-inch card in half for younger children. In the middle of one card, they should draw a lion. In the middle of the other, they should draw a cage. The two cards should be taped together at the end of a pencil or small, thin stick so one picture is visible on each side. The fun begins when they start rubbing the pencil quicker and quicker between their palms and the lion appears to be in the cage. Have them repeat the experiment by drawing a man and the moon. Each time they'll see images after they are gone.