Shooting Glasses Question

Paul · Post by **Paul** » Thu Jun 03, 2010 9:16 pm

Could someone please let me know if it is always better to position the lens as close as possible to the eye ? Is there a minimum distance under which it would be counter-productive to position the lens ?

I'm asking this because everytime I take the lens out of my Champion Olympic frame and that I position it closer to my eye while holding it with my fingers, I get a better sight picture. Only problem is, I don't have the necessary adjustments with this frame to get the lens that close to my eye in prone position...

Thanks for your opinion !

Jason · Post by **Jason** » Thu Jun 03, 2010 10:16 pm

Totally! Here's a picture my son took tonight of my position:

You'll notice that my lens is a tad low and I've since lengthened the nose piece to raise it so I'm looking through the optical center of the lens.

If you have the Olympic frames you should be able to position your lens the same -- my frames are the older World Championship 2 model.

Jason

bruce · Post by **bruce** » Fri Jun 04, 2010 3:07 am

If you get the lens too close, it will be more likely steam up.
And the prescription should take into account the distance between the eye and lens. The gap between them is likely to be greater in shooting frames, in comparison to more mainstream frames.

David Levene · Post by **David Levene** » Fri Jun 04, 2010 3:16 am

Jason wrote:You'll notice that my lens is a tad low

It would also appear to be slanting backwards slightly.

Paul · Post by **Paul** » Fri Jun 04, 2010 6:07 am

The distance between my lens and my eye is about the same as Jason: roughly 30 mm. From what I can see from pics of other shooters, it's about a ''standard'' distance.

So, according to what Bruce wrote, if I get a better sight picture when I get the lens closer to my eye, it may means that I need a new prescription, right ?

Thanks again !

RobStubbs · Post by **RobStubbs** » Fri Jun 04, 2010 8:21 am

Paul wrote: So, according to what Bruce wrote, if I get a better sight picture when I get the lens closer to my eye, it may means that I need a new prescription, right ?

Thanks again !

That was going to be my suggestion. Lens positioning will alter the magnification slightly, and will have more effect the greater the prescription is.

Rob.

Jason · Post by **Jason** » Fri Jun 04, 2010 8:45 am

David Levene wrote:It would also appear to be slanting backwards slightly.

My head was moving because I was telling him where to sit to take the picture -- he's only 9. ;)

The best thing to do is to take your glasses with you when you visit the optometrist. That way he/she can measure the distance to your lens and adjust the prescription accordingly. If they don't do this you might as well just wear your normal glasses.

It would also help to measure the distance from your lens to your rearsight and from there to your frontsight, too. All this info will help the optometrist tweak your prescription.

Jason

Guest · Post by **Guest** » Sat Jun 05, 2010 7:40 am

Paul -

The distance from the eye to the lens is referred to as vertex. Individuals respond diffrently to this adjustment than others. It can make a significant difference. I clearly prefer to have the lens close to my eye as with my everyday glasses. I have tried to use shooting frames and have consistently gone back to a more traditional frame. The problem with fogging under certain conditions can be a real barrier. In those conditions, I have a very small battery powered fan that I aim towards my head and that clears up the problem immediately.

Dennis