jtallen83 Posted December 18, 2018 Report Share Posted December 18, 2018 As soon as I saw the drop down menu with all the lens strength choices I knew I had a question for @Armed Eye Doc http://www.bjonessights.com/AR15.html What am I looking for in my eyeglass prescription that will clue me in on what power lens I would need for one of the B Jones sights? Quote Link to comment Share on other sites More sharing options...
Armed Eye Doc Posted December 18, 2018 Report Share Posted December 18, 2018 I'm at work and will look at this closer when I get time. A basic point of info though, the numbers 0.25, 0.37, etc... are an inverse of distance in meters. A "+" in front of the number means the lens focuses the image going through the lens like a magnifying glass or reading glasses. A "-" in front of the number means the lens spreads out the image as it goes through. These lenses are used to correct near-sighted people (can see up close but not far without glasses). If you have your prescription, I can look at it and the info to see if I can make sense of it. It will also depend on where your front sight is located since that is what you are wanting to get in better focus. Quote Link to comment Share on other sites More sharing options...
unforgiven Posted December 18, 2018 Report Share Posted December 18, 2018 Great question brother, I've seen the site but couldn't understand the +/- Quote Link to comment Share on other sites More sharing options...
Armed Eye Doc Posted December 18, 2018 Report Share Posted December 18, 2018 Here is his explanation of what power to choose. It basically depends on what distance you are shooting and what you need to see better, the post or target. It assumes good vision outside of the optics, whether corrected or not. http://www.bjonessights.com/power.html Quote Link to comment Share on other sites More sharing options...
unforgiven Posted December 18, 2018 Report Share Posted December 18, 2018 Thanks Doc great info. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted December 19, 2018 Author Report Share Posted December 19, 2018 Thanks Doc, Loved the numbered options they lay out for selection, odds are I'll take the phone number to talk to a real person option! Haven't tracked down my latest prescription yet, put it where I wouldn't loose it so I know it isn't lost....... If I read correctly on this topic then there is a chance that my prescription glasses combined with the correct size aperture may correct focus issues. Found I have a .060 and a .048 now. Then there is the front post selection process. Need to assess and decide just how far down the rabbit hole I wanna chase this thing, should have known that opinions, information, and miracle gadgets would all be abundant on the subject of national match sights. Having @Armed Eye Doc around for subjects like this is the only way I could have separated numbers that matter from the minutia of salesmanship. Quote Link to comment Share on other sites More sharing options...
98Z5V Posted December 19, 2018 Report Share Posted December 19, 2018 (edited) I don't think those peep sights will correct any vision issues - the smaller the rear peep you're looking through, the more it will focus your vision (attention) on what you need to focus on, which it the front sight post. Basic Rifle Marksmanship comes into play - rear right is fuzzy, front sight post is in focus, target it slightly blurry/fuzzy. That's proper sight picture. Edited December 19, 2018 by 98Z5V Quote Link to comment Share on other sites More sharing options...
Armed Eye Doc Posted December 19, 2018 Report Share Posted December 19, 2018 None of the options they offer are strong enough to change vision significant amounts. They may help older eyes sharpen the front sight slightly, but, as Tom said, the peep sight alone should help with that (think pinhole camera). Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted December 19, 2018 Author Report Share Posted December 19, 2018 Shot a few boxes with it today. Front sight focus was OK, target was a blurry blob and went down hill the longer I shot. The results were so good I'm thinking I need to shoot it as is for now, maybe a smaller front sight post so I can see a bigger blur for the target? Quote Link to comment Share on other sites More sharing options...
unforgiven Posted January 4, 2019 Report Share Posted January 4, 2019 (edited) From what I read you can't have it both ways. Target fuzzy sharp sights or Target sharp sights fuzzy. When I started shooting with both eyes open it was fuzzy sights sharp Target. Just my 2 mags Edited January 4, 2019 by unforgiven I'm fuzzy Quote Link to comment Share on other sites More sharing options...
SgtDog0311 Posted December 4, 2019 Report Share Posted December 4, 2019 JT, you've probably solved your problem by now but I was fishing around for some iron sight options/discussion when I happened on this. For the last three years I've shot BPCR & BPTR with Montana Vintage Arms peeps and struggled with advanced glaucoma as well as plain old aging eyes. You have to adjust windage and sometimes elevation between each shot so having a 2.5 magnification is necessary for me to even see my setting as I make adjustments. Yet my glaucoma has got progressively worse and my front sight progressively less sharp, especially this year. I finally got a #1 magnifier at the top edge of my shooting eye lens to achieve the sight-picture 98 describes, and a 2.5 bifocal on the bottom left lens of my shooting glasses in order to read calibration on my staff for between-shot windage & elevation adjustments. Not sure how that would work if you are already wearing corrective lenses but so far its working for me. Quote Link to comment Share on other sites More sharing options...
jtallen83 Posted December 4, 2019 Author Report Share Posted December 4, 2019 4 hours ago, SgtDog0311 said: JT, you've probably solved your problem by now Not really solved, just shot it enough that I got the feel for it. Betting I could tighten the group up a good bit with that setup though Quote Link to comment Share on other sites More sharing options...
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