Maxx,
Yes they can do an eye test there, but if he already has a bona fide lens prescription from Canada/USA, he only needs to pick out the frame(s) he wants his prescription fitted too. Done that myself on occassion... The measurement used in eye tests is universal so no problem....
If he doesn't have a prescription yet, then best save his money and have that done in China too, it'll save him even more money ...hahaha!!
David....