Obviously a pistol is needed if she wants to carry, but that may be a problem given eyesight problems. As for home defense is do believe that shotguns are the best choice in most situations. Did she try any lighter load shells? I know that target rounds won't have near the effect of buck, but I think it should serve nicely in a home. As to the recoil, if you have the cash there are many with really nice but stocks available. Otherwise, I am reminded that quite a few cases of successful self defense involved a 22, rifle or pistol. It seems to be more than enough to scare off intruders, and still wounds quite handily in the confines of a home. If she really has allot of trouble handling anything bigger, it's something to consider. Or a 20 Guage for that matter.