I was about -6.5. I think the answer to the question is that it depends on how thick your cornea are, and how far the surgeon is willing to push it. Some surge

I was about -6.5. I think the answer to the question is that it depends on how thick your cornea are, and how far the surgeon is willing to push it. Some surgeons are more comfortable working with thinner margins of error than others. You want a doctor that is conservative on this metric. I would go in and get a (free) scan to find out whether or not you're a good candidate.