Well, it is hard to say how long does the macular degeneration progress. For it all depends on the types and the causes. Generally speaking, macular degeneration is a chronic eye condition most common in people over 60. In common, it can lead to blindness. If you get it, it may make you lose their central vision, which is the ability to see straight ahead. On the other hand, the peripheral vision can be remained. And there are two kinds of macular degeneration, which is classified with dry and wet. In common, dry one can progress slowly, while wet one can be faster. For more questions, you can console it with doctors.