Two years ago I read two full length novels on my 4S. Since then my eyes have degraded considerable, and I find it difficult to focus on my 5S unless I hold it at a distance that makes it too hard to read. Getting old... yay. So if anyone reading this has a similar issue, do you find that the Plus sized iPhones solve this? As I understand it they have the same resolution, right? So that would seem to mean text is physically larger? Does that help?