Greetings,
I use typing white-out on the back of the front blade, really helps. The white-out comes in a handy little bottle with a built-in brush. It dries instantly and is easily removed. Wearing my bi-focals doesn't work so I got a pair of 2.5x full lens reading glasses at wallmart, now I can see the front sight. However, the target is fuzzy.
I have a few three-dot sights on revolvers and they are a great combat sight but not optimal for paper. I never tried fiber optics, but they seem to work for the proctologist.
Soon they will have clamp-on television cameras so you can use a 23inch monitor for sighting. Good Luck.
P.A.