The human eye is an important sensory organ that serves visual perception and orientation. The eyes also provide insight into a person's emotional state. The capabilities of the human eye are so complex that even modern science struggles to replicate them technically. Approximately 160,000 Germans live without sight, with around 10,000 more added each year. Up to 40,000 blind Germans may soon regain their vision thanks to a microchip. This book offers an overview of the eye, its functionality, and the most common eye diseases that can lead to blindness.