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Virtual Dictionary

Retinal Binocular Disparity

Retinal binocular disparity or RBD refers to an unequal connection between the two eyes when working in tandem to focus on a single image. Typically caused by deterioration in one retina or the other, it marks the difference between the convergence angle of the pupils trying to focus on an object in front, and the angle of the object relative to the eyes ? the eyes pull off-centre in the direction of the weakest retina.

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Retinal Binocular Disparity


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A new route to Retinal Displays - Holographic Lenses
Retinal display systems have been under development for many years with few successes. A new, and fundamentally different approach to the problem is now being trialled by researchers at the Technion-Israel Institute of Technology. Professor Shy Shoham and team are testing the power of holography to artificially stimulate cells in the retina of the eye, with the intent of bionically restoring vision. As a side-effect it would of course create a whole new class of retinal displays.

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VR Interfaces: Boston Retinal Implant Project
The 'virtual light' class of retinal displays, are perhaps unique in the display industry, because they don't actually display anything. The entire concept is built round bypassing the eye entirely, and dropping visual encoded information directly into the optic nerve.

The Binocular Omni Orientation Monitor or BOOM was one of the very first immersive VR interfaces, predating even the HMD. Massive and unwieldy, they none the less have some valuable properties which still see them in use today.

VRD or Virtual Retinal Display is an offshoot of HMD display technology, which, instead of placing a pair of display screens in front of the eyes, actually projects an image directly onto the human retina with low-energy lasers or LCDs.

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Large Image Display: Chrysalis: Optical Door Locks
This still from Chrysalis shows a very different method of locking and unlocking your front door than we are used to. There is no key and no key hole. Instead, what there is is a retinal scanner embedded in the door level with the average head. Peer in and if it recognises you, it unlocks. If not, there is nothing to pick.

The Argus devices, created by Second Sight Inc, are ocular implants designed to restore vision to those whose eyes no-longer function. For people whose sight loss occured as a result of outer retinal degenerations, such as Retinitis Pigmentosa, they offer a chance to see again, via arrays of electrodes connected to the back of the eye and the optic nerve.


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Inspired by the success of cochlear implants that can restore hearing to some deaf people, researchers at MIT are working on a retinal implant that could one day help blind people regain a useful level of vision.

Inspired by ...

Scientists have created a three-dimensional, retina-like structure out of human embryonic stem cells that they hope could someday serve as a retinal transplant for people with macular degeneration and other diseases of the retina. Their met...

A team of Stanford researchers has developed a new generation of retinal implants that aims to provide higher resolution and make artificial vision more natural.

This could be a boon to the several million people in the Unite...

Surgeons of University Hospitals Leuven have been the first to operate on a patient with retinal vein occlusion using a surgical robot. Operated by an eye surgeon, the robot uses a needle of barely 0.03 millimetre to inject a thrombolytic d...

The latest generation of retinal implants has shown striking promise in tests involving a handful of blind patients. The implants have enabled many subjects to recognize objects and obstacles and given one person the ability to read large p...