I recently had Night Fision sights installed on my Springfield XD, which I use for home defense. I used to shoot with one eye closed, but recently began learning to shoot with both eyes open. I was having difficulty acquiring a good sight picture because of presbyopia (aging eyes), but started getting better with practice. I have a red dot sight on my EDC, a Springfield Hellcat, and practice co-witnessing the iron sights during my daily wall drills. In my difficulty using iron sights only on my XD, I noticed something peculiar about how I acquire my sight picture with my new night sights.
When I do wall drills with the XD, it’s extremely difficult to clearly see the sights. I have to squint one eye to acquire them. I read an article on the USCCA website by Grant Cunningham on shooting with old eyes. He said he tried focusing on the target and aligning blurry sights with great success. I tried that during dry fire using a laser cartridge with interesting results.
If I have an object on which to focus that is at least about 3 feet away, I can look at the target and quickly acquire a very clear sight picture as if I were looking through the sights at the target. The target will look a little blurry, but I can still see it and the sights clearly enough to place my front sight at a precise point I want to shoot. It’s as if I’m using one eye to focus on the target and the other to focus on the sights. I don’t know if maybe my brain learned to do this by co-witnessing the red dot and irons simultaneously on my Hellcat.
I don’t know exactly how to describe it, but it’s weird to me because I can get a very clear sight picture with an object on which to focus far away, but cannot do it with a wall up close when I do wall drills.
Anyone have thoughts or insights on this?