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June 28, 2016, 05:13 PM | #26 |
Senior Member
Join Date: November 11, 2009
Posts: 506
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Hmmm...
Well I just picked up my new glasses! The difference in how sharp the world looks is amazing. Except for the fact that the computer screen I'm looking at now looked skewed, it's a big improvement and I may end up using them a lot.
Unfortunately, from the tests I've done so far at home, I see zero change to my sight picture. I have a scaled down appleseed target for 5 yards, and the smaller silhouettes (which are now crystal clear when I focus on them) still more or less vanish once I focus on my front sight. When I take the glasses off, it suddenly seems worse but after a few seconds I can get pretty much the same sight picture without them. I suppose the range will be the real test but I was hoping I'd be able to see the difference immediately. |
June 29, 2016, 05:55 PM | #27 |
Senior Member
Join Date: December 3, 2002
Posts: 1,264
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There's a website called shootingsight and the guy there offers a lens that will drop into a hooded AR rear aperture. He understands the vision aspect of shooting very well and is worth giving a call.
The ideal prescription for shooting is probably +0.75 of what you got on your glasses. But you need the doc's prescription as a starting point, so you're headed in the right direction. |
June 29, 2016, 06:33 PM | #28 |
Senior Member
Join Date: November 11, 2009
Posts: 506
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Thanks for the link. I've read many of that guy's posts on various forums and he seems to know what he's talking about.
He says that the optimal place to focus is the hyperfocal distance, which is twice the distance from your eye to the front sight, if I remember correctly. Apparently this results in getting both the front sight and the target just within your depth of field. And that's why he recommends around +0.5 or +0.75 diopters - this puts your natural focal point at around 2m from your eye, which is about right for most rifles. My prescription does actually include +0.5 (right) and +0.75 (left) of spherical correction, and I didn't understand this at the time, but maybe that's why the doc included that. But I am still trying to focus on the front sight, and maybe that is what's causing my problem. Maybe I should practice differently, although I'm not sure exactly how. |
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