Any product that is popular in the market place has to compete with its own fakes. Fake oakley sunglasses are the result from people trying to copy a great product for a profit not rightly theirs. Fake Oakleys look much like the original product but they may be very different in quality. They may be similar in appearance but they may not be as well made or offer the same amount of sun protection for your eyes. The main reason to wear sunglasses is to protect your eyes and fake oakleys may not be doing that they way the originals do. You may not be getting any protection at all.
Some people don't care if the replica oakleys are doing the job of protecting their eyes. They just want to wear them so it looks like they can afford the real ones. The advantage to the fakes is that they are often much cheaper priced than the real ones making them appealing to people on a budget. They like to think they look like they can afford more rather than making sure their eyes are well guarded. Fake glasses usually do not offer any guarantee that they will last as well because of quality manufacture or protect at all. They may just be cheap glasses with colored lenses.
Fake oakleys or any fake products are a problem in the market. People may buy fake oakley sunglasses only to be disappointed and think the Oakley company has let them down. It is a matter for buyer be aware and make sure you are not being fool by a look alike product.