If this article is correct then a cure for blindness could be developed within the next six years. According to the article a simple 45 minute operation which involves injecting new cells into the back of the eye could be the answer. The surgery is being developed by researchers at the Moorfields Eye Hospital in London to tackle the most common cause of blindness age related macular degeneration (AMD) which affects around 500,000 in the UK. The treatment involves growing human embryonic stem cells in a lab. These cells are able to turn into different types of cells and so can be used to create small patches identical to the damaged cells in the eyes of AMD sufferers. The cells are injected into the back of the eye where they replace these damaged cells are restore sight. The treatment has already been tested successfully on rats and pigs and human trials are due to begin within two years.