If you had “contact lenses that let you see in the dark—with your eyes closed” on your 2025 bingo card, congratulations. Thanks to a group of neuroscientists and materials scientists working in China, the phrase “I see what you mean” may soon be accompanied by actual superhuman vision, no squinting required.

Taking Super-Vision Literally

According to a report from Phys.org, scientists have engineered contact lenses embedded with nanoparticles that transform near-infrared (NIR) light (800–1600 nm) into visible light. Unlike traditional night-vision goggles—which require chunky batteries and an air of tactical seriousness—these prototypes demand only the commitment it takes to pop in a regular contact lens. No power source needed, no conspicuous starship trooper aesthetic.

In an overview by Science Focus, the researchers detail how volunteers wearing the prototype contacts could perceive flickering signals from infrared LEDs, invisibly pulsing through the darkness, and could even do so with their eyelids closed. Professor Tian Xue, who led the project at the University of Science and Technology of China, clarified that “when the subject closes their eyes, they’re even better able to receive this flickering information, because near-infrared light penetrates the eyelid more effectively than visible light, so there is less interference.” So yes, in one of those ironies only science seems to love, closing your eyes may actually help you see more—at least in infrared.

Heat Vision? Not Quite

If your dreams involve spotting glowing figures like a sci-fi monster hunter, there’s a small catch. As The Sun notes in its coverage, this technology currently detects only certain bands of near-infrared, not the longer “thermal” wavelengths your radiators or fellow mammals emit as heat. The contacts best pick up light projected by an infrared LED, rather than the faint body heat of your neighbor.

Still, the contacts boast some surprising capabilities. As Phys.org details, mice outfitted with the lenses chose to avoid an infrared-lit chamber, indicating that they were perceiving the light, while contact-less mice wandered in blissful ignorance. Meanwhile, human wearers could identify morse code-like flashes and the direction of invisible light beams—a feature that could intrigue fans of secret codes, security tech, or low-key espionage.

Color-Coding the Invisible

Something especially eye-catching: by engineering the nanoparticles to fluoresce at different visible wavelengths, the researchers managed to “color-code” various parts of the infrared spectrum—converting 980 nm light to blue, 808 nm to green, and 1,532 nm to red, according to Phys.org’s analysis of the Cell study. The Sun also notes that differentiating colors in the normally invisible spectrum could be handy for applications like secure information transfer or anti-counterfeiting.

But it’s not all “Mission Impossible.” There are potential benefits for accessibility. As described in Science Focus, Professor Xue speculated that this approach might be adapted to help color-blind individuals: “By converting red visible light into something like green visible light, this technology could make the invisible visible for colour-blind people.” So, while the “supervision” headline fits, the mundane can also get a boost.

Limitations do persist, however. Close proximity to the retina causes the converted light to scatter, making fine detail elusive through the lenses alone. Phys.org documents how the research team addressed this by developing a separate pair of glasses employing similar nanoparticle technology, improving sharpness for those who want their secret infrared messages in high-def.

Closing Your Eyes to See More

Between encoding secret signals, enhancing color perception, and giving literal meaning to “sleep with one eye open,” these contacts feel like an elegant mix of weird possibility and real scientific progress. The Sun highlights potential uses in security, rescue, or even anti-counterfeiting, and Science Focus muses about future adaptations for those with vision impairments.

Does this mean we’re approaching an era where eyes-closed communication becomes the new normal, or secret hand signals travel, invisibly, across a crowded room? Will the phrase “didn’t see it coming” hold up in court when you’ve got contacts capable of outwitting visible light? One thing’s for sure—this isn’t the kind of wearable tech that demands hype. The facts alone invite a quiet, wide-eyed wonder (or perhaps a contemplative blink with eyes shut). Sometimes, the strangest breakthroughs peer out from unexpected corners—no superpowers required.