Overview

• Scientists at the University of Science and Technology of China have created contact lenses that enable infrared vision by converting near-infrared light into visible light using upconversion nanoparticles.
• The lenses allow wearers to detect flashing infrared signals, perceive light direction, and differentiate between multiple infrared wavelengths through color-coding technology.
• Infrared vision is enhanced when wearers close their eyes, as near-infrared light penetrates the eyelid more effectively than visible light, reducing interference.
• A complementary nanoparticle-based glass system has been developed to address the lenses' current limitations in spatial resolution, enabling higher-definition infrared perception.
• Researchers are now working to improve the lenses' sensitivity to ambient infrared light and refine the technology for practical, real-world applications.