About
Profiles a series of animals with unusual eyes and explains how such animals use their uniquely evolved eyes to gain essential information about the biological world. This book explain how, for most animals, eyes are the most important source of information about the world in a biological sense. The simplest eyes, clusters of light-sensitive cells, appeared about 600 million years ago.

Discuss Eye to eye with other readers

Join or start a book club for Eye to eye on Readfeed. Live chat, shared reading progress, and AI discussion questions — free to get started.

Frequently asked questions

How do I join a book club for Eye to eye?

Sign up free on Readfeed, then browse public clubs or start your own club with Eye to eye as the current read. Invite friends with a share link and discuss together with live chat and AI discussion questions.

Can I discuss Eye to eye with other readers online?

Yes. Readfeed book clubs let you chat live, share progress, and join discussions about Eye to eye with readers worldwide — whether your club is virtual, in-person, or hybrid.

Is Readfeed free?

Yes. Creating an account and joining book clubs is free. Sign up to find readers who love the same books and start discussing today.