The use of light has revolutionized medical technology several times in history. Light and electron microscopy make it possible to examine the structure of biological tissue on a drastically smaller scale, allowing complex macromolecules such as DNA and proteins to be visualized in real time and dynamically. Optical and photonic technologies enable the observation of molecular details in cells and tissues. Advanced spectroscopic techniques are used to make a medical diagnosis and to monitor the progress of a therapy. Sill Optics produces optics for the biophotonics and medical technology of tomorrow.