I would recommend a routine eye exam with a private Optometrist. Print out a copy of this ( http://www.bullseyepistol.com/wong1.htm) and give it to him or her before the exam. See if they will allow you to bring in your gun if so you can be looking right at the sights when getting everything dialed in. As you age up close doesn't work as well as it used to. Sights in focus are most important. Target a little blurry is okay. I like single vision in front of my shooting eye. Progressive lenses work but you're always hunting for that sweet spot. Polycarbonate material is good and safe but if you can find Trivex lenses I like them a bit more. Image is a little more crisp.
