+1. This is how I worked on my fear of descending on the mountain bike. DH and I found a moderately steep hill with long straight run outs in a couple of directions, and I rode that darn thing at least 20 times, working to stay off the brakes and just roll until the ground leveled out. When that felt ok, I started turning at the bottom and trusting the tires as I rolled through the turns. I'm still a little timid on descents, but I'm much better than I was.
Interestingly enough, wearing contacts has improved my descending as well. My vision isn't awful (I can legally drive without correction), but with correction, I can see clearly further away and I think that makes me more comfortable, especially at speed.
Good luck!