miracle for blinds.......Bionic Eye

bionic eye.

This is not new topic but certainly it is interesting one.
The description and concept of bionic eye was since long in the talks but how far has this been applied practically?
On March 22, 2012, two British men Chris James and Robin Millar had undergone 8 hours operation and got bionic eye implanted. Amazing right!!
Chris James, who had been totally blind for more than 20 years, is able to see a rough outline of simple shapes, and doctors believe that in time -- as his brain "learns" to see again -- he could recognize faces.
 Robin Millar, 60, from London, is one of the patients who has been fitted with the chip along with 1,500 electrodes, which are implanted below the retina.
Components of bionic eye...

• A digital camera that's built into a pair of glasses. It captures images in real time and sends images to a microchip.
• A video-processing microchip that's built into a handheld unit. It processes images into electrical pulses representing patterns of light and dark and sends the pulses to a radio transmitter in the glasses.
• A radio transmitter that wirelessly transmits pulses to a receiver implanted above the ear or under the eye
• A radio receiver that sends pulses to the retinal implant by a hair-thin implanted wire
• A retinal implant with an array of 60 electrodes on a chip measuring 1 mm by 1mm.    

         Lets see how the bionic eye works....                                                                                                                                                                                                                     The system works in the following pattern. Firstly, light from the object (flower) enters the video camera (fig 4). The video camera then sends the image of the flower to the wallet size computer for complex processing. The processor then wirelessly sends its image of the flower to an infrared LED-LCD screen mounted on the goggles. The transparent goggles reflect an infrared image into the eye and onto the retinal chip. Just as a person with normal vision cannot see the infrared signal coming out of a TV remote control, this infrared flower image is also invisible to normal photoreceptors. But for those sporting retinal implants, the infrared flower electrically stimulates the implant’s array of photodiodes. The electrodes stimulate the remaining retinal nerves; allow a signal to be passed along the optic nerve to the brain. What makes this unique is that all functions of the retina are integrated into the chip. It has 1,500 light-sensing diodes and small electrodes that stimulate the overlying nerves to create a pixilated image  I

n the brain, patterns of light and dark spots are perceived which give a basic level of vision to the patient, who is able to be more mobile and independent as a result.    

A wireless microprocessor and battery pack worn on the belt powers the entire device. Thus, image amplification and other processing occur in the hardware, outside the eye.

SEEING IS BELIEVING.......

 
For more information check the below site.

http://www.dailymail.co.uk/sciencetech/article-2138775/The-eye-borg-First-successful-implant-bionic-eye-restore-sight-blind.html