It may take anywhere from three to six months for your eyes to fully heal. At six weeks it is still too early to tell whether or not your vision is stable or if it is still going to improve. If your vision does not improve by the three to six month mark, your surgeon may evaluate to see if you are a candidate for an enhancement.
It takes about 3 months for the eyes to completely stabilize after Lasik. However, after 6 weeks things should be pretty clear. You might need an enhancement.