Augmented Reality (AR) promises to relieve us from from the boredom of mundane reality and can also help you navigate unfamiliar environments. Current AR tech leaves something to be desired, but researchers at the Korea Electrotechnology Research Institute have brought AR contact lenses closer to actual reality.
The researchers micro-printed FeFe(CN)6 ink onto the contact substrate and thermally reduced it at 120˚C for nine seconds to form Prussian Blue, an electrochromic pigment. By confining the material with the meniscus of the ink, resolution was better than previous techniques to display data on contact lenses. While the ability to reversibly change from clear to blue faded after 200 cycles, the researchers were targeting a disposable type of smart contact lens, so degradation of the display wasn’t considered a deal breaker.
Since voltages applied were constant, it seems this isn’t a true bi-stable display like e-ink where power is only required to change states. The on condition of a section required 0.5 V while off was -0.2 V. The researchers printed a contact with straight, left, and right arrows as well as STOP and GO commands. Connected to a GPS-equipped Arduino Uno, they used it to navigate between ten different checkpoints as a demonstration. Only a 3D printed eyeball was brave enough (or had IRB approval) to wear the contact lens, so watching the state change through a macro lens attached to a smartphone camera had to do.
With more AR devices on the way, maybe it’s time to start embedding household objects with invisible QR codes or cleaning your workshop to get ready for your AR workbench.
In German, Prussian Blue is called Berlin blue.
Soon do we get the contact lenses used by Torchwood members? awesome !
In Vienna, hot dogs are called frankfurters, but in Frankfurt they are called Wieners.
More useless additions:
In most parts of western Germany Krapfen (https://en.wikipedia.org/wiki/Berliner_(doughnut)) are called Berliner while in Berlin they’re called Pfannkuchen. Which are something completely different in Western Germany (namely pancakes).
“Ich bin ein Berliner!”
Maybe what Kennedy was really saying to East-Germany was ‘Bite me’.
Steve Austin would have been the first AR candidate.
Cyanide in the eyeball. Hmm.
Interesting that cyanide in Prussian Blue is not toxic, for the same reason it is so toxic when the CN is free to roam around: it binds so tightly to the iron atom that even oxygen can’t shake it loose. What makes Prussian Blue dye is what makes hemoglobin die. (ok, the hemoglobin survives, but outlives its host).
This is the sort of thinking that started the anti-vax movement.
Elemental chlorine is quite deadly and elemental sodium violently reacts with water. Yet you couldn’t live without salt.
Found the NPC.
Silly troll.
And it’s funny when an academic paper has to struggle to find a marketable application for its technology, even when it’s plainly obvious the application as described simply cannot work: There is no way you can focus on a dyed ‘print’ inside a contact lens.
I also find it pretty difficult to believe you can hide a GPS receiver in the contact lens too, but it’s easy enough to carry a wristwatch with a receiver in it to drive the eyeball display.
Just need it to indicate “hit” or “stand”.
Double, insurance and split too!
Could anyone explain, how an eye is supposed to focus on an image placed on its surface as well as on objects more or less at infinity? This seems achievable only with holographic displays.
Well, if you had something very dark and thinner than the desired shape, then the blurred result would still be understandable for simple shapes. IDK
Nope, not when it’s literally inside the lens, unless you bring in holography or Fourier-domain optics. In which case a simple dye won’t do.
I was wondering the same, surely the researchers are aware? So what gives?
What I don’t get is how the activating voltages are supplied to the lens, are there thin wires going to the eyeball from a brow/temple receiver, 7-of-9 style?
Don’t you mean 2 of 38?
B^)
My contact lenses are telling me to commit sudoku again. I need an Apple Genius™ to fix my iEye.
Aye-yi-yi!
You mean your EyePhone ?
Solution in search of a problem.
Contact lenses are made to correct vision or change your eye color. They were originally invented for aesthetic reasons. If you don’t have eye problems and aren’t an actor or a diver, then you don’t have any reason to use contact lenses aside from personal preference. They’re irritating to the eyes, difficult to maintain, can’t be worn by everyone, and can cause serious infections and other complications from sustained use if you’re not careful.
Glasses are the only option that works for everyone. Nearly everyone can put on a pair of glasses, and many are forced to wear them often for protection when on the job or outside in the sun. You are not going to convince the general population to suddenly become comfortable with touching their exposed eyeballs to insert contact lenses if they don’t have an occupational reason or an eye problem to begin with, and you are not going to impress anyone that already has issues with wearing them.
What a waste of effort to even spend the time researching this as a potential application. Try asking actual users of contact lenses before you start trying to smart-ify them.
I have worn glasses almost my whole life and past six years I wear contact lenses. If I didn’t have to, I wouldn’t use any optical aid. Lenses are a PITA, but pros outweigh cons so I use them.
“They’re irritating to the eyes, difficult to maintain, can’t be worn by everyone, and can cause serious infections and other complications from sustained use if you’re not careful.”
My personal experience, YMMV:
I have been wearing contacts for over 35 years. Number of eye infections in that period: zero.
My cleaning discipline is absolutely horrible: I clean them when my vision starts to blur, which is at most once a month. Irritating? Most of the time I don’t notice they are there.
Disclaimer: I use the rigid oxygen permeable lenses. The soft lenses require very strict cleaning discipline, as they easily acquire protein buildup.
AFAIK the eye can’t focus on such a near object as a contact lens. Unless there is a dedicated zone with proper “lens” correcting the focus of the display elements. For AR this focus needs to change when the display zones are on and off.