Working through Aimpoint and Astigmatism

[jlw]

Whatever works, I guess. But that just doesn't make sense from an optical standpoint unless you are trying to focus on the dot instead of the target.

Erik Lund recommends having the optic further back than many people run them. The article appears to have been lost in USSA's web page revamp, but it was mentioned in the following thread here:

https://www.m4carbine.net/archive/in...p/t-70638.html

[Hmac]

Is an Eotech less prone to this? With a 1MOA dot, it could be pretty explosive/starburst/tail-having, I would think?

The center dot, less so because it's a 1 MOA dot that is generated by the holograph film. With Aimpoint it's about the size of the LED that they use to generate the dot.

On the Eotechs, if you try to focus on the reticle, the ring itself will become very pixellated and fuzzy because that ring is made up of many 1 MOA dots. If you focus on the reticle, you will be able to more or less resolve those dots into individual points. You don't want to do that.

A lot of problems with red dot sights get blamed on astigmatism. At least some percentage of those aren't eye problems but instead are people who just aren't clear on how an RDS works or how to use it. The misunderstanding is particularly aggravated by people who need some sort of vision correction, and most particularly by people who are old enough to have some degree of presbyopia and try to use vision correction for that.

[mikejg]

I'm pretty sure PRK/LASIK would eliminate the problem.

Does anyone if this is the case? I have contacts/glasses and also have astigmatism and am due to get corrective surgery in September (The Navy is finally getting around to my name!)

[Hmac]

Does anyone if this is the case? I have contacts/glasses and also have astigmatism and am due to get corrective surgery in September (The Navy is finally getting around to my name!)

PRK might be a little better than LASIK for correcting astigmatism, although the newer wavefront lasers are very good at that. The better lasers can correct as much as 6 diopters of astigmatism. Depending on your degree of astigmatism and your degree of nearsightedness/farsightedness, you might have to have each eye done twice, once for the correction and once for the astigmatism.

[mikejg]

Thanks, Hmac. Neither is that bad, so I should be able to knock it out in one fell swoop. I was leaning towards PRK over LASIK.

[monadh]

Try something with a green dot. My Redfield Counterstrike works well with my astigmatism.

[PatrioticDisorder]

Thanks, Hmac. Neither is that bad, so I should be able to knock it out in one fell swoop. I was leaning towards PRK over LASIK.

How old are you? I had PRK performed in my early 20s and in 1 year my eyes regressed. I'm now 31 and considering having it done again, sick of contacts. The advantage with PRK over Lasik is no flap that can get knocked open, the disadvantage is the regression rate is higher.

If you're early 20s your eyes may still regress, once you hit 30s your eyes generally stay pretty stable. Also when I had it done it wasn't with the newer machines that correct the entire eye, leaving the "halo" effect with your night vision. Make sure you have it done with a newer machine so your night vision will be good, I'd imagine that it would really screw the dot up on an aimpoint at night if you don't.

[Labayu]

Do yourself a favor and go look through someone else's T1 and see if you still see the same problem.

I sent in my T1 under warranty for replacment/repair and the dot on the T1 they sent back to me as a replacment sucks.

I wish I had just retapped the stripped screw hole and kept the first T1 with the perfectly round sharp dot instead of sending it in to Aimpoint.

[PatrioticDisorder]

Do yourself a favor and go look through someone else's T1 and see if you still see the same problem.

I sent in my T1 under warranty for replacment/repair and the dot on the T1 they sent back to me as a replacment sucks.

I wish I had just retapped the stripped screw hole and kept the first T1 with the perfectly round sharp dot instead of sending it in to Aimpoint.

Why not send it back to Aimpoint telling them the dot sucks compared to your first one? I bet they make it right.

[Labayu]

Why not send it back to Aimpoint telling them the dot sucks compared to your first one? I bet they make it right.

I tried that, they told me that I must have suddenly developed an astigmatism in the 6 weeks it took them to send me a replacement T1 the first time.

I have an old M68 with no such sudden astigmatism problems..

That's why I told the OP to go look through someone else's Aimpoint T1 before he assumed his astigmatism was really interfering with his sight picture.