the two worst things you can do are hire a private detective to follow your wife and to look at a watch dial under a 10x or stronger magnification. Your brain will lock onto any and every imperfection, you will doubt forever what you have loved for years, what once brought smiles to you lips will now bring furrows of suspicion to your forehead. It is the beginning of the end. This is why we close our eyes when we kiss...love cannot survive a close up view.
Save the lens for bugs and things you do not love...never use it on a watch again.