It can be helpful to those who are just dealing with very mild cases of this normal condition of aging eyes, which is called presbyopia.
The slight fuzziness of the pin can be ignored and the focus concentrated on the spot on the animal that you wish to hit,.... for a while.
For most of us, the condition slowly becomes more pronounced with advancing years until that advice is no longer applicable, because the "slightly fuzzy" pin has become a faint and colorful cloud that blends with the other colorful clouds close to it and is totally worthless in determining where you are aiming. And all the colorful clouds that used to be sight pins disappear while there is still plenty of legal shooting light in the evenings and don't come back until nearly sunup in the morning.
The better solution is to admit to the condition and seek help in correcting the condition.
If you do that, you will usually find that it's better to correct your vision to a degree where your aiming eye can still quickly and easily bring the pin into sharp focus.
There a number of ways to do that, including a "verifier" lens in a peep sight that acts as a "reading glass" for your aiming eye. They do work, and are available in various strengths to fit your needs. Some find that to be a perfectly satisfactory solution and others don't.
Many find "monovision" to be a better answer. That is visual correction by whatever means (contact lens, eyeglasses, etc.,) that correct the aiming eye to different focal length than the other eye, allowing the user's brain to select the image most helpful as it does naturally when we are younger.
Most solutions involve closing the non-aiming eye at final aim to avoid occasionally shooting using a vision of a pin that our aiming eye sees sharply onto the view of the target or animal that our open non-aiming eye sees more sharply. That's a fairly rare event that can result in a well-aimed arrow hitting a foot or so to one side of where we thought we were aiming it if we try o keep both eyes open and simply concentrate more on the vision of the aiming eye.
The best solution will vary from individual to individual depending on many factors.
I have worn glasses since I was eight years old and found the best solution for me was daily wear contacts that were under-corrected for distance vision in my eye by about 1.5 diopters, which gives me sharp correction at about thirty inches. The pin is sharp, and more importantly for hunting, is still clearly visible in the reduced light when hunting is best, and the animal is still very visible and easily seen even with my fully corrected non-aiming eye shut. The non-aiming eye's full sharpness is thee immediately available by simply opening that eye while finding the target or the animal, and is only gone when settling in on final aim right before release.
You might find it helpful to get a better feel of the difference in distance vision when the aiming eye is corrected for sharp vision at thirty inches by visiting the nearest display of reading glasses at a drugstore or supermarket and trying on a few. Take along something with fine print on it, like a pill bottle. The readers there will be marked with their correction levels and you can find the one that best sharpens you vision at arm's length, then see how much difference it makes in your vision when you try to read a sign at the other end of the aisle. You will see that while there is some loss of sharpness at distance through that lens, it is slight by the comparison to the loss of sharp focus at close range without it.
That is pretty much the trade-off you will be making by correcting your aiming eye fully for sharp vision at thirty inches. It's not a one-for-one trade-off of making the distant target an indistinguishable cloud of color like your sight pin has become in order to regain the sharpness of the pin. It's more a matter of accepting a slight fuzziness in the target downrange in order to regain the full usefulness of the sight pins at arm's length.
Good luck and welcome to your golden years 8^)
Verifiers can work wonders once you find which one works best for you. Best I can remember, they come in 5 different strengths.
One potential problem verifiers can have is sun glare. If you're shooting in the direction of the sun, in certain instances, it can be like putting a million candle-power spotlight up to your eye. Needless to say, taking a shot isn't possible. Verifiers can be a Godsend, but something you need to be aware of.
If it is the target that is blurry, then glasses would probably be the cure.
If it is the pins that are blurry, glasses may still be the solution. I had to start using very weak reading glasses. 0.25 power in fact. I had to special order them. I suspect that is exactly what the verifier does. Made the pins/front sight clear even though the target is still slightly blurry, but it works for me.
I use a 1.5+ reading glass and the number 5 verifier. That's the second from the bottom. Sure helped with seeing the pins and vertical wire on my Spot Hogg and really didn't seem to blur the target either.
And if you remove the verifier, you end up with a 1/4" peep.
I just wish that they would make an actual 1/4" verifier.
I have used them when hunting from a tree stand or in ambush for elk and pronghorn.
The same idea as a verifer but I still have a 1/4 inch peep and using them is an option.
I had a thread on their use last year and some of the bowsiters ordered them.
My best, Paul
For me....I don't worry about my pin being blurry I just focus on the target. If you can do this you might find that the less you see or notice your pin the better you shoot. This is definitely the case for me.
Serviceable when it got to seeing two blurry pins... just used the lower right hand pin and ignored the other.... killed plenty of stuff at what some consider fairly long shots. Just had to wait till the planets aligned....
No fun at all when it got to 3 blurry pins.
Eyes checked out.... new glasses. One fairly clear pin.... as a good friend once told me.... archery is fun again.
Good Luck!
This is the best description of the problem I've seen. Those that haven't been there don't understand.
Verifier has worked for me also.
Expensive, but you can't just find very low power ones in stores
