sight picture

Hello all, With my aging eyes, it's getting harder to see plain iron sights on my pistols. There are countless ideas for various types of paints, but I came across a stick-on product called "Nitesiters," which are glow in the dark (but you do have to expose them to light) and "Daysiters," which...

With peep sights, I've heard that moving one's eyes closer to, or farther from, the aperture will cause changes in elevation. This seems suspect based on my knowledge of how peep sights work, but I haven't been able to find any detailed information about this online so thought I'd ask here...