You really need to consult with your ophthalmologist to have these questions answered in full. It's surprisingly difficult to give (and therefore get) a straight answer about the success rate of refractive surgery. Why? Principally because there are different means of determining the outcome. For example, success can be defined as being able to read a certain line on a letter chart without glasses; alternatively you could say that anyone within +/- 1 dioptres has had a successful operation. In both instances, many of those with a "successful outcome" may still need to wear glasses. Some people find this prospect acceptable, others do not. You need to decide what you'd be happy with, and then ask the doctor what chance you have of such an outcome. Kai has already mentioned some of the variables (though I should add that it's pretty trivial to add in a calculation to account for individual corneal curvatures). At your age, you are likely to have large pupils, and this makes it slightly harder to achieve an adequate correction. If you have a relatively high correction, then the outcome is also slightly less predictable. You should also bear in mind that your refractive error (prescription) needs to have been stable for a couple of years - the best that any surgeon can guarantee is that you'll be corrected for the refractive error you present with (they can't ensure that things won't change in the future). On the plus side, many refractive surgeons are now willing to have the technique done on themselves (which is a good sign), and there is currently no evidence to suggest that having refractive surgery adversely affects the integrity of the eyeball (i.e. ability to withstand trauma). As with any surgery, there are risks of complication. These include infection, incomplete or inaccurate correction (the risk of the latter is reduced if the surgeon's equipment has an advanced eye tracking device), spontaneous re-opening of the flap incision (very rare) and loss of corneal translucency. Will the technique get better in the future? I think that it's likely that it will. In the last few years for example, the technique has been extended to attempt to correct some of the innate imperfections ("higher order aberrations") in the optics of the normal eye.