Bionic Contact Lens


Bionic
contact lens puts the screen into the eyes.

     Scientists are testing a pixel at a time. The greatest difficulty is the power wireless contact lens, viewed in the right eye of a rabbit.


    Holography simulated

    Information shown in real time, which seem to float at a point just in front, without the need for screens, is something closer to reality.

    Researchers have developed the first prototype of an intelligent contact lenses monitor the pressure of the eye. This contact lens may cause projection of information without the user needs to remove his hands from the steering wheel, for example.

    As projected images simulate the presence of a hologram in front of anyone who uses the contact lens, scientists call it the "holographic projection". In fact, there are generated holograms - the image is projected directly onto the retina.

    Praviz Babak and colleagues from the universities of Washington, USA, and Aalto, Finland, just test your bionic contact lens in rabbit eyes, with no record of side effects.

    This is an important step in an investigation that began in 2008.


    Virtual reality

    For now, it's just a concept: a bionic contact lens has a single pixel.

    But now made conditions for the addition of more pixels until enough to generate useful images.

    Read emails, text messages, information about the car's speed, even virtual reality environments are among the possibilities raised by the researchers to use - when the lens bionic become practical.

    It could also operate in conjunction with biosensors, which capture information about the user's health and show the results in real time, while he is exercising, or walking.



    Bionic Contact Lens

    A contact lens is formed by a bionic antenna to capture the energy sent by an external source, and a wireless-electronic circuit responsible for its functioning.

    The energy is transferred to a transparent sapphire chip containing the heretofore a single LED.

    The biggest challenge for the researchers was that the focal length of the human eye is at least a few inches, which makes the images projected by the lens appear blurry.

    The solution was deploy Fresnel lenses on the contact lens. These lenses are very flat and thinner than conventional lenses, capable of projecting the image generated by the pixels directly on the retina.

 

    Wireless Electricity

    An improvement has to be done is to increase the distance required to feed the contact lens, for wireless power requires that the source is only two inches away from the lens.

    The researchers want to increase the range to one meter, allowing the placement of the power source at the waist or inside a backpack. Another group was able to feed an already implanted heart by wireless power at a distance of 30 cm.

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