The human eyes are very important in the world we live in. Sure we can survive without them, yet having the ability to see makes life much more bearable. Having the ability to see brings beauty to a life that can be so dark. The eyes are an amazing part of the human body. When thinking about the human eyes we ask ourselves three questions: What are the human eyes made up of? How do the eyes work to give us the picture we see? And what problems occur in human eyes that alter our sight and make it hard for us to see"

The eyes are comprised of many things. In Optics, (fourth edition), it says that the eyes can be thought as a positive double lens. (Hecht) The eyes cast real images. They are almost spherical in shape. The radius of the eye is about 12mm...