Cover the larger hole with waxed paper and tape it in place. Make sure that all edges are covered so that no light can get in.
6
Paint the eye over the newspaper, foil and waxed paper.
7
Mount the eye on a piece of wood with modelling clay. Take a large clump of clay and glue and mould it into the base of the eye. Glue it onto the wood base.
8
Going into a dark room with one window open will demonstrate the way that the eye works. Place the model in front of a window and the images outside will be upside down on the waxed paper, just as they are on the retina.