Thanks for the advice, everyone. I don't know if I'll have enough time to get a prescription in the US in time, but how come it's not recommended to do the full exam and frame purchase in Singapore?

Oh, and SingaPaul, ah yes I've been to the country a couple of times, and each time I thoroughly enjoyed chili crab, especially with the mantou. Now I actually have a non-cholesterol related reason to go back!