Dr. Robert Osher takes you on a journey that begins with an unusual and fascinating biomicroscopic finding and ends with a new, expanded understanding of the visual system. His patient presents with a rare trait that he shares with several family members, a polychromatic peripheral anterior capsule, the hue and intensity of which change as a slit lamp passes back and forth. Dr. Osher shows how the iridescence is likely caused by light interacting with the patient’s unique nanostructural architecture.