I'll try to expand on this a bit as I am one of those oldies that need bifocals. I have a Verifier lens in one of my bows.

There are 5 different diopters to fit the Specialty Super Ball Peep. I forget the color coding but they range from #5 to #9, with the lowest number having the least diopter correction.

They thread into the peep and are changeable. They come in different sizes also, up to 1/8" if I remember right.

I have +2.00 bifocals and can use either a #5 or #6 and it does clear up the pins. If you get too much correction the pins will still be clear but the target will become blurry. You have to try them to see which does the best for you. If you use Progressive bifocals you may be out of luck.

One thing I might mention is that if you shoot with both eyes open then you have some "brain retraining" to do, as one eye is looking through a lens and the other isn't. It'll look a little wierd for a while. Depending on how bad your eyes are you might consideer the lens for 3D and target and just remove it for hunting where absolute pin-point accuracy is not needed for fairly short shots. Again, this is something you have to try for yourself. With the lens removed the hole will be 3/16" which helps pass more light through.

NOW, if you check Specialty's website you'll also see that they make a hunter version, which has a tube. This one has a bigger hole so the lens is bigger to boot. 1/4" if memory serves me right. Maybe the ticket for hunting. The peep body itself is plastic so here's what I did. I just took a pair of wire cutters and removed the protrusion that the tube connects to. Then filed it flush. Just a little "push" here, but I have Gibblet's string on my bow so no tube is needed (ya like that John?).

In case anybody is interested you may also find them on Lancaster Archery's website. That's where I got mine. I live only 35 miles from there.

Again, do not buy one on a whim. You really need to try the Verifier to see which works the best for you and draw your own conclusion.

Barry