contact lens

In the Terminator movies, Arnold Schwarzenegger’s character sees the world with data superimposed on his visual field—virtual captions that enhance the cyborg’s scan of a scene. In stories by the science fiction author Vernor Vinge, characters rely on electronic contact lenses, rather than smartphones or brain implants, for seamless access to information that appears right before their eyes.

These visions might seem far-fetched, but a contact lens with simple built-in electronics is already within reach; in fact, my students and I are already producing such devices in small numbers in my laboratory at the University of Washington, in Seattle. These lenses don’t give us the vision of an eagle or the benefit of running subtitles on our surroundings yet. But we have built a lens with one LED, which we’ve powered wirelessly with RF. What we’ve done so far barely hints at what will soon be possible with this technology.

Conventional contact lenses are polymers formed in specific shapes to correct faulty vision. To turn such a lens into a functional system, we integrate control circuits, communication circuits, and miniature antennas into the lens using custom-built optoelectronic components. Those components will eventually include hundreds of LEDs, which will form images in front of the eye, such as words, charts, and photographs.

These lenses don’t need to be very complex to be useful. Even a lens with a single pixel could aid people with impaired hearing or be incorporated as an indicator into computer games. With more colors and resolution, the repertoire could be expanded to include displaying text, translating speech into captions in real time, or offering visual cues from a navigation system. With basic image processing and Internet access, a contact-lens display could unlock whole new worlds of visual information, unfettered by the constraints of a physical display.

Besides visual enhancement, noninvasive monitoring of the wearer’s biomarkers and health indicators could be a huge future market. Sensors built onto lenses would let diabetic wearers keep tabs on blood-sugar levels without needing to prick a finger. The glucose detectors we’re evaluating now are a mere glimmer of what will be possible in the next 5 to 10 years.

We’ve fabricated prototype lenses with an LED, a small radio chip, and an antenna, and we’ve transmitted energy to the lens wirelessly, lighting the LED.

We’re starting with a simple product, a contact lens with a single light source, and we aim to work up to more sophisticated lenses that can superimpose computer-generated high-resolution color graphics on a user’s real field of vision.

The true promise of this research is not just the actual system we end up making, whether it’s a display, a biosensor, or both. We already see a future in which the humble contact lens becomes a real platform, like the iPhone is today, with lots of developers contributing their ideas and inventions. As far as we’re concerned, the possibilities extend as far as the eye can see, and beyond.

Link: spectrum.ieee.org/augmented-reality-in-a-contact-lens/

More:

• Rainbows End becoming science fact! – xixidu.net/rainbows-end-becoming-science-fact/
• Bionic Contact Lens Displays for Augmented Reality – xixidu.net/bionic-contact-lens-displays-for-augmented-reality/
• Inside These Lenses, a Digital Dimension – Eyeglass & contact lens displays – nytimes.com
• Personal contact lens displays: The transparent OLED done one better – geek.com
• Contact lenses with circuits, lights a possible platform for superhuman vision – uwnews.org
• Rainbows End (science fiction novel): Augmented reality is dominant, with humans interacting with virtual overlays of reality almost all of the time – en.wikipedia.org/wiki/Rainbows_End
• Augmented Reality – en.wikipedia.org/wiki/Augmented_reality