Text Messages Direct to Your Contact Lens

Belgian researchers announced in December 2012 that they had built a spherical, curved LCD display small enough to embed in a contact lens, a step toward projecting text messages, directions, and other information directly onto the wearer's eye.

What did they build?

The team at Ghent University's Centre of Microsystems Technology created a curved liquid-crystal display that conforms to the shape of a contact lens and receives images wirelessly. Earlier lens displays had been limited to a handful of pixels; the Ghent design used the whole curved surface of the lens.

"Now that we have established the basic technology, we can start working towards real applications, possibly available in only a few years," said Professor Herbert De Smet.

What would it be used for?

The researchers sketched several applications. The simplest was a single-pixel lens acting as adaptive sunglasses, darkening on demand. More ambitious: overlaying road directions or projecting text messages from a smartphone straight onto the eye. Medical uses included controlling light transmission to the retina for patients with a damaged iris. And for the vain, a tunable iris color, changeable to suit the wearer's mood.

"This is not science fiction," said Jelle De Smet, the project's chief researcher, who predicted commercial applications within five years. He was careful to add a caveat: "This will never replace the cinema screen for films. But for specific applications it may be interesting to show images such as road directions or projecting text messages from our smart phones straight to our eye."

The team described the prototype as a first step toward fully pixelated contact lens displays with television-like detail.

Did it pan out?

The five-year commercial timeline proved optimistic, as these things usually are. A decade later, smart contact lenses remained a research project, pursued by companies like Mojo Vision, which demonstrated working prototypes with built-in displays but had not shipped a consumer product. The core insight held, though: the eye is the ultimate screen, and everybody wants to put one on it.

FAQ

Who developed the lens display? Researchers at Ghent University's Centre of Microsystems Technology in Belgium, led by chief researcher Jelle De Smet under Professor Herbert De Smet.

How did it work? A curved LCD embedded in the lens, powered and fed images wirelessly, using the full lens surface rather than a few pixels.

When was it announced? December 2012, with commercial applications predicted within five years.

Are display contact lenses available now? As of the mid-2020s, no consumer product has shipped; prototypes exist but power, safety, and manufacturing hurdles remain.

The takeaway

Every few years someone announces the screen on your eyeball is five years away. It never is. But the Ghent lens was a genuine milestone: the first display shaped like the thing it was meant to sit on.