I think you need to consider how severe your vision problem is. I have a friend who is an independant dispensing optician, and he has told me that for most vision, you can get an adequate pair of glasses there,but with major correction, the more accuracy that is used in making the glasses, the better the results are. He sees lots of people who have had glassed fabricated where the lense is correct but not made custom to their Focal center so they feel a little out of focus. It is kind ofthe same with me. I am a dentist I see a lot of work that comes in from Discount centers that is absolutely fine, however, in the complex cases you kind of have to use a little caution.