The first step I think is to print targets with white bullseyes and only the very center black.
I'm also going to start painting all my front sights with white nail polish; that seems to help a lot, at least in the dim basement.
For shooting indoors in the 5-10 yd range, the GTA pistol shooting match targets (5M and 10M scaled for 5M) work well.https://www.gatewaytoairguns.org/GTA/index.php?topic=114750.0https://www.gatewaytoairguns.org/GTA/index.php?topic=115064.0I tried painting the front sight but could not get good contrast with the gap on each side. I left the sight black, use low power reading glasses, added a target light, and use a 6 o'clock hold. With the bull under an inch, offhand is good practice for me.
Man I know the theory in gun shooting is front sight focus. I come from archery where you look through the pin/dot and focus on the x in the target. I will never be convinced the archery way doesn’t translate. You can’t hit what you can’t see. The sight doesn’t have to be perfectly clear to know it’s lined up.
I usually wear bifocals at 1.75x power for reading & up close work and single vision computer glasses at 1.25x power for computer work or anything in 3 to 6 foot range. So I had a pair of yellow tinted shooting glasses made in single vision 1.25x for iron sights, puts front sight in sharp focus with blurry target & rear sight. Red dots & magnified optics make this a non-issue but some guns are just not optic friendly or are just more fun with irons.
The target should be blury. The front sight in focus.