A revolutionary technique being developed by British scientists could cure blindness in millions of people around the world. The first 45-minute operations could take place within five years and could be as commonplace as cataract surgery in a decade. The improvement is likely to be great enough to transform lives, allowing the blind to regain the ability to carry out everyday tasks such as reading or driving. The pioneering stem cell surgery tackles age-related macular degeneration (AMD), the most common cause of blindness in the elderly. There are about 300,000 sufferers in this country and the number is expected to...