see the world because light gets into your eyes. Your eye uses that
light to make an image of the world inside your eye—just as
a camera uses light to make a photograph.
understand how your eye makes an image of the world, you need to
know a little bit about lenses. Learn about lenses and experiment
with a magnifying glass to discover how light makes an image of
the world here.
Once you know how lenses work, you can follow the path of light
through your eye and find out how your eye uses light to make an
image. You can do that here.