Understand how dry macular degeneration occurs. Dry macular degeneration is due to a degeneration of the cells in the retina. The degeneration or dying of these cells and the lack of excess fluid gives it its dry name.
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He thinks Amazonâs forecast is conservative. A Kiva robot drive unit is seen, foreground, before it moves under a stack of merchandise pods at one of Amazon's newest distribution centres in Tracy, Calif.. Amazon uses 15,000 robots in 10 different distribution centres. (Brandon Bailey / AP)