Yes, I have shot rifles with this sight, although I don't have vision problems (yet) so I don't have them on my rifles. One fellow used electrical tape, covered the rear of the sight, then opened only the center aperture.Have you used this?
IF that doesn't quite do it, one can always go farther back..., although unlike the bullseye which fits into the rear sight dovetail, this needs drilling and tapping of the tang...
LD