麻豆约拍

The field of bionics has transformed medicine for centuries, as far back as the ancient Egyptians who created bespoke toes from wood and leather. During the 20th Century mechanical and electronic advances made heart pacemakers and more sophisticated prosthetic limbs possible.

Now, researchers are creating bionic eyes to help blind people see again. Neurosurgeon Jeffrey Rosenfeld, director of the Monash Institute of Medical Engineering in Australia, hopes to implant tiny 鈥渃eramic micro-electrode tiles鈥� into the brain鈥檚 visual cortex of blind volunteers this year 鈥� bypassing the normal visual pathway. A digital camera mounted on a pair of glasses captures images which are then processed in a device about the size of a mobile phone. The resulting image is then transferred wirelessly to the tiles in the brain 鈥� the more tiles, the more detailed the image.

Such techniques designed to help people with disabilities could also be adopted by others wanting to enhance their own senses or performance. Anders Sandberg, senior researcher at the Future of Humanity Institute at Oxford University, ponders over the ethics of bionics. He supports morphological freedom 鈥� the right to modify our bodies 鈥� but also the right to say no.

(Photo: Bionic hand. Credit: Mark Runnacles/GettyImages)