Rifle Scopes astigmatism and red dot optics

LSOSGT1109

LSOSGT1109

Demoted by the change
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Minuteman
Oct 19, 2006
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London, KY
#1
I was just reading a review of the Millett DMS-1 on midway usa. A guy was saying that red dot optics such as the Eotech he had always look like a cluster of little dots to him instead of one solid dot. The dots in Aimpoints and Eotechs have always looked like clusters of little dots to me! I have astigmatisms in both eyes and never occured to me that the dots didn't actually look like that! I just thought that's the way they were suppose to look! I don't think it's ever really affected my accuracy with these type of optics but it's always bugged me! Any of you guys ever had this problem?
 
#3
Re: astigmatism and red dot optics

Nope. Aimpoints have always be a nice, solid dot.

Speckey?

I do remember how the instruction mentioned if the dot seemed elongated/oval to rotate it, and if it stayed the same, it was your eye that was distorting the dot and not a problem with scope.....
 
#4
Re: astigmatism and red dot optics

My Aimpoint dot looks like a "comet" when viewed while wearing my corrective lenses.

When I raise my BUIS and use the small aperture the dot gets crisp and well defined.

The pin-hole lens effect?
 
#5
Re: astigmatism and red dot optics

without my glasses, my Eotech looks blurry and like u said "speckly". when I put on my glasses or contacts, it's clear as can be. I also have astigmatism in both eyes. This is normal.

from Eotech's service FAQs: http://www.eotech-inc.com/page.php?id=30

My circle is fuzzy/hazy. Why is this?

That question about our reticle is common. What people usually see on-line or in advertisements are graphic representations of the reticle. What you are seeing is likely normal. The outer circle of the reticle is made up of hundreds of pixels (small dots that form together to make a larger image). This pixilation is key to being able to see the hologram properly, and is inherent in the technology. You should see the center dot as a single MOA.

A couple things might help make the image appear more distinct:

- If you see the image blurry, fuzzy, distorted, having a double image, or having a 'starburst' effect, this usually means the brightness intensity level is up too high for the lighting conditions you're using it in. Dim down the brightness until the reticle is slightly see-through. The outer circle is designed as your reference to center, and acts similar to a ghost ring.

- The reticle is projected out to your target plane. If you pick up a target that is very close (like a photo on the wall), your eyes might not focus properly on the image. Pick up sight pictures 25 to 30 yards out until you become accustomed to the sight. Try them at different eye reliefs, and certainly try these things once the sight is mounted on a weapon.

- If you require corrective lenses (glasses or contacts) to see things clearly at a distance, you will need them to see the reticle clearly. Remember, the reticle is actually projected out to your target plane, so you will see it like anything else at that distance. Also, if you have astigmatism or use bifocals, you may see the image less distinctly.

- Use the sight outdoors, and if possible at the range. Actually acquiring targets with the sight will help your eyes focus properly on the reticle.
 
#6
Re: astigmatism and red dot optics

My 57 yr old eyes require optics on ALL my shooters. I have an Aimpoint Comp M2 on a 9mm carbine. I have noticed that indoors (without glasses) the dot has that "comet" pixelated look. If I step outside and dial the brightness to a "just visible" level it presents a more uniform looking dot. Just another reason to test a new purchase by stepping outside and not just across the store or out the dirty front window. YMMV Joe
 
#7
Re: astigmatism and red dot optics

No, not what i mean = on the Eotech's the dot-circle looks like it's made up of a couple hundred round dots that are not quite touching each other.(grainy)

From another post="I think this is the main reason why people talk about the "speckle" and "haze" and "busy" on the interwebz.
Yes, sir, thank you. I call the effect of an overly bright setting "grainy." It's as if the reticle was being projected through a glass beaded screen. Just turn that puppy down and it will become nice and crisp and with plenty of contrast.'"
 
#10
Re: astigmatism and red dot optics

Both of my Aimpoint's look like small and irregular cluster of dots when looked at in close detail - I have a little bit of astigmatism - it may or may not be my eyes. However, when actually running drills and such I don't notice it whatsover. Bring gun up, dot on target, squeeze.
 
#11
Re: astigmatism and red dot optics

eotech and bushnells holosight both are too fuzzy for me to use. i have a DMS-1 and its fine. i have used other just red dot sights that are crystal clear dots, but these other types of reticles are useless to me. but now that i have a fresh script, it might clear stuff up. but still...
 
#13
Re: astigmatism and red dot optics

I have an astigmatism, and a pretty significant one at that. I wear gas permeable contact lenses to correct this, so I never noticed the Aimpoint dot looking irregular. I just took out my contact lens, threw on the glasses, and there it was, a "comet" looking dot.

If anyone is having problems with this, know that for me the gas permeable contact lenses completely removes this effect. Might work for you too.
 
#14
Re: astigmatism and red dot optics

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: vkc</div><div class="ubbcode-body">No disrespect intended, but I would go see an ophthalmologist and get checked for glaucoma and diabetes. </div></div>

me? none at all. i just had all that done. tiptop. its the astigmatism. but id never pay what an eotech goes for so im same, lol
 
#15
Re: astigmatism and red dot optics

I have astigmatism in both eyes which my progressive lens glasses correct. Neither my EoTech's of Aimpoint;s look abnormal. Both dots are solid.
 
#17
Re: astigmatism and red dot optics

With my glasses on the red dots are clear. I never shoot with my glasses off as the progresives are corrected for near, mid, distance and astigmatism. I imagine if I tried to shoot with them off the dot would be a mess. I first noticed I had the astigmatism problem (my first eye problem) when I stated to see jumping double reticles when I was in my late 30's.
 
#20
Re: astigmatism and red dot optics

Sorry to resurrect an old thread, but I'm curious how many of you do NOT have astigmatism, yet still see red dots that are not "perfect?" I definitely do not have astigmatism. I've been tested since I use eye loupes and/or a microscope regularly at work, and never had even a hint of astigmatism. Still have far better than 20/20 vision and never have issues with eye strain, blurriness, etc. However, every red dot sight I've used has a significant "flare" somewhere around it. My dad has an assortment of EOTechs, Aimpoints, and Burris red dots (all top of the line), and they all have it for him and for me. (Not sure if he has astigmatism or not, but it doesn't seem to bother him at all. I'm much more anal about that kind of thing). I just ordered my first one (Matchdot II), and I'm worried it will bug the heck out of me if it's not a precise round dot. If I don't have astigmatism, what else could be causing the "comet effect"?
 
#21
Re: astigmatism and red dot optics

I do not have astigmatism and my vision is 20/10. I do see starburst refraction on red dots.

If I flip up the rear BUIS and look through the peep, there is no starburst refraction. I assume it is not my eyes and it is simply an imperfect projection of light that is causing scatter, and that the scatter is being blocked by the peephole.

The only time it bothers me is if I sit there staring at the actual red dot itself. In actual use when shooting it is fine.
 
#22
Re: astigmatism and red dot optics

i bought my wife an eotech yesterday. she can look thru it and sees the dot and circle fine. all i see is a red starburst blob. i think it all has to do with my eyes. i can see the dot on all the "cheap" red dot sites i,ve tried just fine. even eotech sayes their site is not going to look like the dot/circle they use to show what it looks like. it will have some pixelation. something about the site picture is somehow projected in front of the unit itself. don,t know. it,s all magic to me. guess i,ll stick with a 1x4 scope and be done with it.
cool site tho, she loves it
 
#23
Re: astigmatism and red dot optics

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jet_lagged</div><div class="ubbcode-body">Nope. Aimpoints have always be a nice, solid dot.

Speckey?

I do remember how the instruction mentioned if the dot seemed elongated/oval to rotate it, and if it stayed the same, it was your eye that was distorting the dot and not a problem with scope..... </div></div>

^^^^^^^^^^^^^^^^^^^^^^^^
IIIIIIIIIIIIIIIIIIIIIIII


I too had the same issue but that only happened indoors.. other than that my comp M4s is just fine
smile.gif
 
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