Have you tried a corrective lens placed in front of JeVois? See below for an example with a 15x lens that is coming from a pair of jeweler glasses that has interchangeable lenses. This is a cheap plastic lens with lots of distortion as you can see (and it was not very well aligned), but we can focus well on the tiny text on that 2.5" hard drive at a very short distance from JeVois. For 4-6 inches, maybe about 5x lens would do the trick.
