Gotta call bullshit on the 'whole different league', at least in the case of oakley vs foakley (IMO, anecdotal, n=2, etc...). There are differences in the lenses (thickness and scratch resistance being the most notable, minor optical differences if you're really looking), but they are no worse than any other £10-15 pair of sunglasses and definitely not ~10 times worse, the price of oakleys implies.
Gotta call bullshit on the 'whole different league', at least in the case of oakley vs foakley (IMO, anecdotal, n=2, etc...). There are differences in the lenses (thickness and scratch resistance being the most notable, minor optical differences if you're really looking), but they are no worse than any other £10-15 pair of sunglasses and definitely not ~10 times worse, the price of oakleys implies.