Who am I? ask captions alongside close-ups of colorful animal eyes. As readers guess which animal belongs to each eye, they will discover that each animal has a unique and amazing way of seeing. Snakes have clear eyelids that cannot ever open or close. Some sea creatures have hundreds of eyes around the edges of their shells. Many animals can see colors that are invisible to humans. Brimming with vivid and engaging photographs, this book also includes a clear explanation of how human eyes work, a labeled diagram of a human eye, a glossary, and an index.