for progressives, outside the channel is blurry - your viewing range is within the middle channel and in those areas are the different focus areas.
The newer ones, the viewing channel is much much wider and its basically a non-issue, but some and depending on insurance coverage - the "old style" is all there is or may be covered.
I mostly am saying this to prep you if you have never had glasses let alone progressives, you do not get "the whole lenses" for viewing and at your prescription level... that is also why some people just buy "normal" glasses and then readers. I have been in progressives since 3rd/4th grade so it is actually hard for me to use single vision, I got single vision sunglasses - as a test, because as I mentioned getting my alignment and valley in the lens perfect is getting more important as I get older - but single vision is hard to adjust because my eyes are used to not "doing" the focus adjustments, and relying on moving my head to put my LoS into the proper viewing channel of the progressive lens.