I don't get it

Let's start by saying what the heck is going on? I just don't get it you all have probably seen these lasik commercials! Now let's take a closer look at this very closely. They say 299.00 per eye and in the first part of the commercial the guy says are you tired of the way glasses or contacts put a strain on your wallet? Now when I was in school in math class they did teach us all about greater than and less than and eyewear for less sells two pairs of glasses for around 84.00 after taxes and 299.00 per eye is 598.00 now I sure think 84.00 is a heck of a lot less than 598.00. So why are they trying to sell us a thing that some may not be able to afford.