Blindness - one word, which stop any one to make think for couple of seconds that how life become difficult if anybody is in this situation but thanks to the modern science nine people have been liberated from the from their blindness, retinal implant that restores light to an eye so these people were able to see otherwise it won't be possible for them to see this beautiful world. The Alpha IMS, is the device which utilizes the eye’s own neurons, unlike some other devices.The device is implanted in the patient’s head and is powered via a separate battery pack that is wireless and located outside of the body. A grid containing 1500 electrodes underneath the retina, is implanted. This method provides the patient with a higher resolution sight than any other available options.The implant works by detecting light. The amount of light detected can be controlled by the patient via a dial that is located behind the ear.The grid works in much the same way as the light-detecting cells in the eyes, and for this reason it does not work for just any type of blindness. Rather, it works for those who have lost their vision due to a condition that has destroyed the eye’s ability to detect light. The biggest advantage to the Alpha IMS over other camera-based methods is that it is more natural, and doesn’t require the patient to wear a camera. Because the implant is under the retina, the eye can be moved naturally to look around, giving the patient more freedom and a more natural vision. The patient’s own eye is responsible for detecting contrast and other such things.
Sources (1) New Scientist (2)SlashGear