Second Grade
Worksheets
Vision - How Your Eyes Handle Light
Light bounces off the things you see and reflects back to your eyes. You have two pupils. You have one in each eye. Pupils are the black circles you see in the center of your eyes. The pupil is actually a hole in the iris, the colored part of your eye. Your pupils control how much light enters your eyes. It is hard to see things when you are in the dark. The longer you are in the dark, the easier it will be to see things. Has your teacher ever turned out the lights in your classroom? At first it may have been really hard to see your classmates. Then your eyes adjusted. It got easier to see. With the lights off, your pupils are big. They are dilated. Your pupils dilate, or expand, when you are in the dark. They do this to help your eyes let in more light and see more of what is around you.
We have all been in a dark room and have .....
