Stuck with an astigmatism it seems like the diopter in cameras will either let me choose to see either the image or the viewfinder info clearly...never both (unless the glasses are on). The viewfinder on the F100 suits well to wearing glasses in my case. Everything is bright, clear and no real drawback. The rubber on the exterior of the viewfinder helps prevent scratches and is easily replaceable if it becomes worn, which is a plus.
Best of luck