Researchers have developed a groundbreaking contact lens technology that enables humans and mice to see near-infrared light by converting it into visible wavelengths. The lenses use specialized nanoparticles embedded in standard soft contact material, allowing users to perceive flickering infrared signals without needing external power.
Tests conducted on both animals and humans showed clear behavioral and physiological signs of infrared perception, even with eyes closed. This technology has vast applications in security, communication, and color blindness support.
The contact lenses work by converting near-infrared light (800–1600 nm) into visible light using nanoparticles. These nanoparticles enable the detection of “near-infrared light,” which is infrared light just beyond what humans can already see. The team previously demonstrated infrared vision in mice when injected into the retina, but this new design aims to create a less invasive option.
When tested on human participants, the contact lenses enabled accurate detection of flashing morse code-like signals and perception of incoming infrared light direction. Participants also showed improved sensitivity with their eyes closed, as near-infrared light penetrates the eyelid more effectively than visible light.
A notable feature of this technology is its potential to color-code different spectra of infrared light, allowing users to differentiate between wavelengths. This could aid color blind individuals in detecting previously invisible wavelengths. The team plans to refine the technology by increasing the nanoparticles’ sensitivity and developing a wearable glass system for higher-resolution information.
This research opens up new possibilities for non-invasive wearable devices that can provide super-vision capabilities.
Source: https://neurosciencenews.com/infrared-contacts-visual-neuroscience-29124