Here's what I did after asking my eye doctor a ton of questions, and spending literal hours searching on the internet, I came up with a solution. May not work for everyone, but it works great for me. Wearing your normal bi-focal glasses, go to WalMart, Dollar General, Dollar Tree, or just about any place that sells those cheap "Reading Glasses". Grab a pair of 1.0 readers, and put them on over the top of your regular glasses. Stand back at arms length, pointer finger extended, from something to read. You will be looking through your distance lenes and these readers at the same time. Is it nice and focused? If not, try the next pair stronger, such as 1.25 or 1.5. What I did was try and read a period at the end of a sentence of normal sized typing letters. Without the readers over my regular glasses, I could not see a period at arms length. With the readers I could see the period. This was with 1.0 readers. I bought these along with 1.25. The cost was $10 total.
Went to the range to try it out. With the 1.0 readers over my regular glasses the rear sight was a bit blurry (like it's supposed to be) the front sight was clear and sharp (like it's supposed to be) and the target a little more blurry than the rear sight (like it's supposed to be). I shot very well. I then tried the 1.25 readers over my regular glasses. This time the front sight was even sharper, but, the target was way too blurry. Did not shoot as well. I found a happy medium with the 1.0 readers.
I then decided that I looked like a goon wearing two pair of glasses, so back to the internet I went. I found on ebay what they call "clip on flip up readers". They are just like those clip on sun glasses, but are readers. I ordered a pair of 1.0 for $15. They work so well for me while shooting I bought another set for back up. When loading mags, scoring targets, etc, you just flip up the readers. Flip them back down to shoot.
Words can't describe how happy I am being able to shoot iron sights again. I am back up to shooting as a Master in PPC, and should soon jump up a class in Precision Pistol. I can even shoot a rifle with iron sights again. I am one happy camper!
Edit: I forgot to add, this set up works two fold for me. I am wearing those "clip on flip up readers" as I type this. It works great as computer glasses.