Vision provides the most important source of information about our ever-changing world. Scientists and philosophers have long sought to understand how we are able to accomplish effortlessly what seems nearly miraculous the conversion of light into sight. For many years, the author participated in a research program directed toward understanding the biology of vision. This book provides a personal summary of that quest. In so doing, it offers unique illustrations of how laboratory science actually works, replete with its inevitable errors and frustrations, while still offering, ever so occasionally, a new and deeper understanding."