This link is an interactive guide to the structure of both the inner and outer human eye. If you hover over any of the various “i” information buttons on the diagram, the name of that part of the eye appears and an explanation about it appears at the bottom of the screen. When viewing the inner eye, you have an option to get a simple explanation as to how sight works. There are also further simple explanations about short-sightedness and long-sightedness.
This is a very simple, yet effective infographic which would look really well displayed on an Interactive Whiteboard in the classroom for pupils learning about the human eye.