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At least 25-30 million people worldwide have age-related macular degeneration (AMD), one of the leading causes of blindness in middle-aged and older adults.
Israeli start-up Nano Retina has announced its new Bio-Retina, a tiny array of photodetectors which can be implanted directly on the retinal surface. Ready to enter clinical trials in 2013, the Bio-Retina restores vision to AMD sufferers almost immediately following the simple implantation process. 
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Doctors in Sweden have replaced a vital blocked blood vessel in a 10-year-old girl using the first vein grown in a lab from a patient's own stem cells.
The successful transplant operation, reported online in The Lancet medical journal on Thursday, marks a further advance in the search for ways to make new body parts.
It could open the door to stem cell-based grafts for heart bypass and dialysis patients who lack suitable blood vessels for replacement surgery, and the Swedish team said it is now working with an undisclosed company to commercialize the process.
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Kidneys make up about 80 percent of transplanted organs. One kidney was transplanted into a young patient with a common disease called focal segmental glomerulosclerosis (FSGS). After transplant, the donor kidney started growing diseased.
But it wasn't the end of the line for that transplanted kidney. Something unusual occurred- the same kidney was transplanted into another patient and the disease was reversed.
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A retired high-school teacher has become the first person in New England to receive an artificial heart. James Carelli, 66-years-old, was suffering from a rare condition that leads to total heart failure if left untreated. As with many others who have received an artificial heart, the substitute buys Carelli the vital extra time he needs while waiting for the real thing.
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A team of bioengineers at the University of Washington has developed the first structure for growing small human blood vessels in the laboratory. The vessels behave remarkably like those in a living human and offer a better and much more modular approach to studying blood-related diseases, testing drugs and, one day, growing human tissues for transplant.
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