Hey I just got my first set of loupes in today and I have a question. It took me forever adjusting the nose piece to get rid of double vision. Now when I put them on its a little blurry or double vision, hard to tell, for a couple of seconds and then I can see perfectly. So does it take time for your eyes to used to looking through them or are my eyes correcting and straining? If the latter is the case I am assuming I should send them back in to be adjusted. Thanks for reading the long post.