In offices, airports, and classrooms, you’re surrounded by artificial light designed for energy efficiency. It’s uniform. Rigid. Biologically inappropriate. And you can’t opt out. Your body is forced to adapt to light that stimulates stress hormones, disrupts your sleep hormones, and interferes with your natural rhythm. Dr. Alexander Wunsch, one of the world’s leading experts in photobiology, explains how this mismatch between artificial light and human biology leads to chronic overstimulation, disrupted circadian rhythms, and long-term health consequences. This is where true light hygiene begins: with awareness—and the agency to choose better light. That’s why we developed our lenses with Dr. Wunsch himself. Ra Optics Blue Light Protection eyewear, alongside our BlueSync technology, filters the exact wavelengths shown to impair biology—especially in the environments where you need control the most.