Just curious as to why my astigmatism is noticeable with an Aimpoint but not with an Eotech? Is it due to looking thru a primary glass to see the dot reflection on the second vs. looking directly at the receiving plant on the Eotech?
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Just curious as to why my astigmatism is noticeable with an Aimpoint but not with an Eotech? Is it due to looking thru a primary glass to see the dot reflection on the second vs. looking directly at the receiving plant on the Eotech?
Used to have an Eotech -- for me, my astigmatism made the center dot kind of a smeary blob instead of a well defined dot. The edges of the circle thing kind of 'bloomed' two, but the center dot smear is what I noticed/bothered me most.
The Eotech dot is 1 MOA IIRC, which makes any blooming less obvious. I still see it, but if a dot looks, let's say, 50% larger, you're going to notice that more in a 4 MOA dot than a 1 MOA. I notice the bloom less with the 2 MOA Aimpoint, for example.
I have severe astigmatism - in addition to 20/450 myopia/near-sightedness (keep in mind legal blindness is 20/200:) My glasses correct for the myopia (back to 20/20) AND the astigmatism. When I use a red dot - I see a nice, round dot. If I look without my glasses - it is blurred because of my nearsightedness - but it also turns into a large oval. I'm guessing that those who see an oval while wearing their glasses don't quite have their astigmatism corrected properly. FWIW - it is MUCH harder to correct astigmatism with contacts - as they always have some ability to rotate on their axis, and that throws off the correction. Also - unlike myopia or hyperopia - astigmatism is caused by an abnormal curvature of either the cornea or the lens. With the more complex asigmatisms - it may not be possible to truly correct for the full condition.
jm
jmoore (aka - geezer john)
"The state that separates its scholars from its warriors will have its thinking done by cowards, and its fighting done by fools." Thucydides
To those who are suggesting prescription glasses with heavily curved lenses like Oakleys, are you correcting for just the astigmatism or an additional eye problem? I have an astigmatism in both eyes and am very near sighted. I was told that my prescription was beyond what could be ground on that style of lens. Has anyone else run into this?
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For an old man, I don't wear glasses (but probably should) but I can read a newspaper OK, so I just don't bother carrying glasses..
I know my astigmatism can't be corrected. My eye doctor was finished flipping (and unflipping) all of those lenses in that contraption I was looking through to help me read the eye chart better when I whupped out my T-1 from my pocket. I told him I wanted to see if the "comma" would be a "dot" now. He said it wouldn't be and he was right. Dadgummit!
But I still shoot pretty good with the T-1. The top left edge of the "comma" is where the bullet's going. It takes a little getting used to it but I think it is worth it.
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Last edited by ucrt; 08-29-10 at 00:08. Reason: Clarity
I see an "8" in Aimpoints when I shoot indoors.....particularly if the lighting is bad (which is almost universally the case with indoor ranges)
EOTechs are much better in this regard.
My glasses correct for more than just Astigmatisms. My lenses have three prescriptions (progressive lenses) in them. I have quite a few pair of glasses all with the same prescription but do not want to take the chance of messing up the lenses with flying brass so my shooting glasses are WileyX. When I got them they were the only company who would make Progressive lenses in a heavilly curved frame. I think Oakley now does Progressives in a heavilly curved lense.
MadDog![]()
Same boat. I can't have my prescription done on anything very curved which is why I am looking at some of the styles by Smith Optics. They appear to be flatter than the Oakleys. I'll retrieve my prescription from my doctor and see if Smith has styles that'll work.
For now, I'm using Ray Ban aviator frames. Very retro (as the younger shooters at the local range like to remind me) but I can see my sights and the frame gives enough coverage to protect my eyes.
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