By now you probably have them? Anyhow, my 2 cents. I've had progressive trifocals for several years. It took a good couple of weeks to get used to them. Actually, they drove me crazy and made me feel sick for a while, but within a couple of weeks all was good and I love them. It's like your brain reprograms itself, and all of a sudden, one day all the problems vanish. No problems at all on bike. I do have a separate set of sunglasses (I like sunglasses not transitions, especially in the car). My sunglasses are bifocals, mainly because of the price difference (and I have been known to drop sunglasses in the lake). No problems for me switching back and forth.