Fluorescein

Fluorescein is a special dye used in medical and scientific settings to highlight and detect areas that might be hidden or damaged. When it’s injected or applied to the eye, it absorbs blue light and glows bright green under specific lighting conditions. In eye exams, it helps doctors identify corneal scratches, infections, or tears. In other fields, it can track blood flow or reveal leaks in systems. Since it’s visible only under certain light, fluorescein is a safe and effective tool for precise diagnosis.