In the sports section of Wal-Mart, near the fishing stuff, they have bifocal sunglasses with +250 readers for about $10. I had a pair that lasted a year and I was very happy. I now have transition progressives which work well. They are more flexible than just the +250. Only downside is they don't darken as much as I'd like in the car. So if it's really bright, I have a cheap pair of sunglasses I keep in the car. But then, I can't see the GPS and dash. It sucks getting old.
Retired at 52 in July 2013. On to better things...
AA: 45% stock, 35% bonds, 15% real estate, 5% cash