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The camera system developed by the EPI-RET project communicates wirelessly with a fully implantable retinal stimulator to give the blind partial vision.  (Source: Fraunhofer IOF)

The implant, viewed here, is tiny and flexible. It features an array of 5x5 electrodes to send images via retinal stimulation.  (Source: Fraunhofer IOF)

A computer generated image of the new compound eye's field of vision. The overlapping views up the resolution many times, allowing for smaller and more powerful image sensors.  (Source: Fraunhofer IOF)
Scientists are conquering some of the greatest challenges in the field of vision

Previously, DailyTech reported on Second Sight Vision's efforts to bring partial vision to the blind through wireless retinal implants.  The company has a strong competitor, though.  Researchers at Aachen University Clinic and the Fraunhofer Institute for Microelectronic Circuits in Germany are pursuing a similar line of research and have also been experiencing strong results.

The Institute's EPI-RET project has been running for 12 years and has sought to find ways to offer relief to the over 30 million people suffering from retinal diseases.  In September 2007, during a clinical study with six patients, it was shown that the group's completely implantable vision prosthesis both was feasible and allowed patients to perceive visual images.

Dr. Hoc Khiem Trieu from the Fraunhofer Institute for Microelectronic Circuits and Systems IMS in Duisburg comments, "For normally sighted people that may not seem much, but for the Blind, it is a major step.  After years of blindness, the patients were able to see spots of light or geometric patterns, depending on how the nerve cells were stimulated."

The project has been funded by
the German Ministry of Education and Research.  Dr. Trieu worked closely with colleagues Dr. Ingo Krisch and Dipl.-Ing. Michael Görtz and medical professionals to translating medical specifications into an engineered implant.

The researchers state that the major breakthrough is making the system's communication wireless.  Says
Dr. Ingo Krisch, "A milestone was reached when the prosthetic system finally operated wirelessly and remotely controlled.  A great deal of detailed work was necessary before the implant could be activated without any external cable connections."

Görtz adds, "The designs became smaller and smaller, the materials more flexible, more robust and higher in performance, so that the implant now fits comfortably in the eye."

Similar to the Second Sight Vision implant, the EPI-RET implant utilizes a CMOS camera in glasses frames to capture images.  This image is then transferred to the implant wirelessly, which stimulates retinal cells.  The implant consists of an array of 25 electrodes (5x5) connected to ganglion cells.  This falls somewhere between Second Sight Vision's original model used in clinical tests, which used a 4x4 grid of electrodes, and its current model, which has an asymmetric 10x6 grid.

The EPI-RET project team hopes to up the number of electrodes in the finished project.  Their Institute has created a spin-off
EPI-RET GmbH, which seeks to market the technology.  After another round of clinical trials, the implants are expected to be offered commercially within three years, according to researchers.  While some might dismiss this team's parallel efforts, it promises to make the field of ocular implants more competitive.

And that’s not the only vision advance that the Germans are cooking up.  Researchers at the
Fraunhofer Institute for Applied Optics and Precision Engineering IOF in Jena are working on developing an ultra thin imaging sensor, which acts as a compound eye and is modeled after insect eyes in nature.  Researcher Andreas Brückner is leading the effort to look at ways to dramatically improve the accuracy of existing imaging sensors by adopting compound eye algorithms, allow the sensors to be potential shrunk, while keeping equivalent accuracy.

Insect eyes, while not high resolution, perceive the world in great detail.  This is due to a phenomenon known as hyperacuity.  As the visual fields of adjacent facets overlap, the eyes see more than the resolution itself.  The result is a higher effective resolution than the physical resolution when the images are processed. 
Andreas Brückner is working to mimic the phenomena in a man-made imaging system.

Andreas Brückner states, "The aim was to develop micro-optical compound eyes which contain numerous parallel imaging channels and which are also extremely compact, thinner than 0.5 millimeters"

After creating a multifaceted sensor,
Brückner analyzed the angular sensitivity of the facets.  By overlapping, based on this analysis, the sensor is able to determine positions from 2D images much more accurately than its resolution would otherwise allow.  In a comparison a 50 x 50 pixel image sensor set up as a compound eye could detect spatial relations equivalent to a traditional 625 x 625 pixel sensor.

The improved resolution will allow sensors to be shrunk.  It will also offer better object recognition, size and position analysis, and movement tracking.  All of these are invaluable advances to industrial and robotics applications.

According to the institute commercialization is well underway.  It states that current tracks include "
solar altitude sensors in automobiles, for recognizing traffic lanes in driver assistance systems, and in machine vision."

With the exciting groundbreaking efforts in vision research in the U.S., Germany, and elsewhere, it seems that many sight related diseases are approaching partial cures, and that sighted applications like robotics will undergo dramatic improvements, implementing new designs.

Comments     Threshold

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By Tsuwamono on 6/3/2008 11:48:57 AM , Rating: 3
We can rebuild him...

RE: ...
By FITCamaro on 6/3/2008 11:55:04 AM , Rating: 4
We don't have the technology.....yet!

I want Jordi's eyes.

RE: ...
By Polynikes on 6/3/2008 12:13:51 PM , Rating: 5
I'd just like a simple zoom feature. 4x would suffice.

RE: ...
By jadeskye on 6/3/2008 12:20:56 PM , Rating: 2
This would inevitably lead to technology that would allow you to see through clothes...

Bring it on! XD

RE: ...
By MrBlastman on 6/3/2008 12:24:43 PM , Rating: 5
You can already do that with a little water... >:)

RE: ...
By JonnyDough on 6/4/2008 8:58:43 PM , Rating: 2
That depends entirely on the clothes. If Benetio Mussolini were around today stirring up trouble, maybe we (cross out we, I meant YOU) could try to convince him that a white shirt gang would be a bit more fashionable than his "black shirt gang", especially if his people were marching in the rain.

RE: ...
By Visual on 6/3/2008 12:42:46 PM , Rating: 2
but if this happened, it would lead to clothes that block X-ray, infra-red and what-have-you rays...

tinfoil bra, here i come.

RE: ...
By tastyratz on 6/3/2008 9:32:48 PM , Rating: 2
enjoy your tinfoil bra.
xray through infrared (aka nightvision) has been a camcorder trickery hack for many years, it actually already exists. I certainly dont plan on selling my old handycam with "lens protecting filter: anytime soon ;-)

RE: ...
By Bruneauinfo on 6/3/2008 11:05:38 PM , Rating: 2
yeah, but that would lead me to spend most of the time wanting that feature turned off.

RE: ...
By Ringold on 6/4/2008 1:26:24 AM , Rating: 1
Perhaps it can be switched on and off with a command phrase.

Hillary Clinton walking towards you? Leave it off.

Jessica Alba? "Cheesy puffs!"

RE: ...
By TimberJon on 6/3/2008 3:00:47 PM , Rating: 2
I would second that, but 2x would be fine with me.

RE: ...
By Smartless on 6/3/2008 3:25:51 PM , Rating: 5
Occular Implants.

"Nuclear Launch Detected"

RE: ...
By AlvinCool on 6/3/2008 2:22:55 PM , Rating: 2
Don't you really want his visor?

RE: ...
By Tsuwamono on 6/3/2008 2:37:56 PM , Rating: 2
his eyes are so much cooler.

RE: ...
By mezman on 6/3/2008 5:24:25 PM , Rating: 2
But his eyes are busted. Do you mean his visor contacts from the movies?

RE: ...
By Ringold on 6/4/2008 1:27:20 AM , Rating: 2
Watch all the movies. He has no visor at all, ultimately.

RE: ...
By captchaos2 on 6/4/2008 2:29:57 AM , Rating: 2
Forget Jordi's eyes, I want Batou's eyes. Ghost in the Shell is almost prophetic.

RE: ...
By Hydrofirex on 6/4/2008 8:38:50 PM , Rating: 2
Ghost in the Shell is Prophetic - period. If you see no other piece of Japanese Animation this would be the one if only because of it's relevance. Prosthetics as a whole is developing rapidly. I think it's pretty easy to say that human augmentation is a given at this point - not that I'm saying it's going to be super-human battles in the streets next week. Besides, the possibilities of information connectivity are far more empowering and compelling.

Serial Experiments Lain is another influential Anime which touches on similar ideas. Aeon Flux (Not the movie dear god!) actually delves into this a lot deeper than I initially realized too.

You can have all eye's - I'll take Aeon or Motoko.


RE: ...
By Hydrofirex on 6/4/2008 8:45:13 PM , Rating: 2


(And yes, you CAN have all eye's )

"A politician stumbles over himself... Then they pick it out. They edit it. He runs the clip, and then he makes a funny face, and the whole audience has a Pavlovian response." -- Joe Scarborough on John Stewart over Jim Cramer

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