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Posted: 12/4/2014 12:05:34 AM EDT
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I have an astigmatism, I get a warped star now with my red dots that don't have a focus ring. My leupy VX-R or VR-X is pretty good since it is focused for me. Does anyone make an aftermarket focus ring device? This would be an awesome device for us old demographic people. |
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I've been told that prism sights/scopes work well for those of us with vision irregularities, but I can't say from personal experience as of yet...though I do plan to get one soon.  Prismatic scopes work well for my astigmatism. I was incredibly surprised that I can use a mini acog without needing a focus ring. Beyond that, the Meprolight M21 is fairly well considered one of the best astigmatism friendly red dots, along with Eotechs because of the small dot size. Vortex did just put out a prismatic red dot as well. Tomac has done lots of posts about astigmatism and optics btw. |
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Prismatic or Holographic (EoTech) are really the only way to go if you have a bad astigmatism. Do you actually have astigmatism? If so you would know with uncorrected eyes any holographic looks like a red snowstorm. I have 4 eotechs and an aimpoint and without my glasses they are useless. |
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I have corrected contact lenses, they work ok. The lens shifts on your eye so it goes through various degrees of clarity when looking through a dot sight.
for the most part I can see the dot pretty clear on my red dots, but it isn't a nice crisp dot but it still works good enough for a man sized target. |
| The most through solution is wavefront adaptive LASIK. It's impossible for corrective lenses to fully compensate for rotation/cylinder, and astigmatism toric contacts have to be weighted so the proper orientation is always down, but then it won't work if you cock your head to look through scope because they float on your tears and will turn down slowly to 90 degrees, but maybe your head and eyes are cocked at 45 degrees to look through the scope. |
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I had astigmatism. still do some. Had lasik and now have 2020 but it's better. I have a vortex SPARC and I don't like the red dot because of this. The size of the dot has to be very small for me. 1 MOA dots. the aimpoint pro works well for me and I like it because of the smaller dots.
Focus on the target, not the dot and that helps. Co-witnessing with iron sites helps. Eotechs give me no problem at all and with a G33 magnifier, it works really well. I'd stay away from larger MOA red dots. Smaller the better to reduce affect. |
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The most through solution is wavefront adaptive LASIK. It's impossible for corrective lenses to fully compensate for rotation/cylinder, and astigmatism toric contacts have to be weighted so the proper orientation is always down, but then it won't work if you cock your head to look through scope because they float on your tears and will turn down slowly to 90 degrees, but maybe your head and eyes are cocked at 45 degrees to look through the scope. I have BAD astigmatism and with contact lenses in my aimpoint looks fine no matter what angle I have my head. Without contacts or glasses the Aimpoint would be worthless past 10 yards or so. Without corrections my vision kinda sucks anyways so I would have to have a magnified scope or I couldn't ID my target correctly. |
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I have astig in both eyes. But my right eye .. which is my dominant eye has it much worse as gotten alot worse in the last 4 years. Turns out I have a growing cataract in that eye stemming from trauma caused a fist, a baseball and a hackysack to that eye ( in that order ) over time. Doc says that after surgery i should have perfect vision from that eye. Involves replacing the lens with an synthetic one. I am going to see if they cant install a 1x -4x zoom kinda like an Elcan.
Until then I will use variable low power scopes for anything over 50 yards. |
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Do you actually have astigmatism? If so you would know with uncorrected eyes any holographic looks like a red snowstorm. I have 4 eotechs and an aimpoint and without my glasses they are useless. Quoted:
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Prismatic or Holographic (EoTech) are really the only way to go if you have a bad astigmatism. Do you actually have astigmatism? If so you would know with uncorrected eyes any holographic looks like a red snowstorm. I have 4 eotechs and an aimpoint and without my glasses they are useless. Same here, and my astigmatism really isn't bad. An eotech reticle looks like lots of vertical hash marks going around in a circle with a dot in the middle. Totally unusable for me. |
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Same here, and my astigmatism really isn't bad. An eotech reticle looks like lots of vertical hash marks going around in a circle with a dot in the middle. Totally unusable for me. Quoted:
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Prismatic or Holographic (EoTech) are really the only way to go if you have a bad astigmatism. Do you actually have astigmatism? If so you would know with uncorrected eyes any holographic looks like a red snowstorm. I have 4 eotechs and an aimpoint and without my glasses they are useless. Same here, and my astigmatism really isn't bad. An eotech reticle looks like lots of vertical hash marks going around in a circle with a dot in the middle. Totally unusable for me. Huh, I have astigmatism (mild) and it looks like advertised, just not solid, more of a red squiggle forming a circle. The center dot commas slightly but is still plenty usable for me. |
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I have astig in both eyes. But my right eye .. which is my dominant eye has it much worse as gotten alot worse in the last 4 years. Turns out I have a growing cataract in that eye stemming from trauma caused a fist, a baseball and a hackysack to that eye ( in that order ) over time. Doc says that after surgery i should have perfect vision from that eye. Involves replacing the lens with an synthetic one. I am going to see if they cant install a 1x -4x zoom kinda like an Elcan. Until then I will use variable low power scopes for anything over 50 yards. I had both of my lenses replaced. Your new lens will correct the problems caused by the Cataract but will not help your astigmatism which is caused by incorrect curvature of the cornea. Don't be surprised if you must address that also to get that perfect vision. |
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I had both of my lenses replaced. Your new lens will correct the problems caused by the Cataract but will not help your astigmatism which is caused by incorrect curvature of the cornea. Don't be surprised if you must address that also to get that perfect vision. Quoted:
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I have astig in both eyes. But my right eye .. which is my dominant eye has it much worse as gotten alot worse in the last 4 years. Turns out I have a growing cataract in that eye stemming from trauma caused a fist, a baseball and a hackysack to that eye ( in that order ) over time. Doc says that after surgery i should have perfect vision from that eye. Involves replacing the lens with an synthetic one. I am going to see if they cant install a 1x -4x zoom kinda like an Elcan. Until then I will use variable low power scopes for anything over 50 yards. I had both of my lenses replaced. Your new lens will correct the problems caused by the Cataract but will not help your astigmatism which is caused by incorrect curvature of the cornea. Don't be surprised if you must address that also to get that perfect vision. UNLESS you pay lots of money for a toric lens implant. |
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Do you actually have astigmatism? If so you would know with uncorrected eyes any holographic looks like a red snowstorm. I have 4 eotechs and an aimpoint and without my glasses they are useless. Quoted:
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Prismatic or Holographic (EoTech) are really the only way to go if you have a bad astigmatism. Do you actually have astigmatism? If so you would know with uncorrected eyes any holographic looks like a red snowstorm. I have 4 eotechs and an aimpoint and without my glasses they are useless. Amen brother. Eotechs are useless to me. Aimpoints kinda look like a small lightning bolt to me. I can still get decent hits out to 200yrds. The 3x magnifier takes it back to a perfect dot. |
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Yeah I thought about toric's but it would have cost me $1500 per eye out of pocket and the Dr. could not guarantee I still wouldn't need some astigmatism correction in my glasses since toric's do not completely eliminate astigmatism in many patients.
With the regular implants my out of pocket for everything was $150 per eye. What most people don't realize is with implants (regular or toric), you still have to wear glasses for at least 1 of the 2 focal distances. If you choose a distance implant lens you have to have glasses for reading, if you choose a reading implant you need glasses for distance. If you want to see perfect at an intermediate focal distance (computer distance) you will need glasses for that too. So since I had to have at least 1 pair of glasses with either type of implants and need some type of glasses when shooting for protection which could include the astigmatism correction I chose the $150 route. That $3K savings bought me two Eotechs, a rifle, accessories and lot's of ammo. |
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I have corrected contact lenses, they work ok. The lens shifts on your eye so it goes through various degrees of clarity when looking through a dot sight. for the most part I can see the dot pretty clear on my red dots, but it isn't a nice crisp dot but it still works good enough for a man sized target. The lens shifts on YOUR eye. I'm corrected for astigmatism in my right eye and my contacts actually fit. Might need to get fitted with a different brand. Pain in the ass I know...... 
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Can someone define astigmatism? Can someone describe astigmatism as it relates to the anatomy of various ocular structures?
Can anyone explain why the focusing ring on your scope does not "correct astigmatism?" Why does everyone throw "astigmatism" out when they don't like the flare of brand x's dot? For the record, I have astigmatism, and I don't have problems with eotech, aimpoint, Trijicon, or anyone else. |
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Amen brother. Eotechs are useless to me. Aimpoints kinda look like a small lightning bolt to me. I can still get decent hits out to 200yrds. The 3x magnifier takes it back to a perfect dot. Quoted:
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Prismatic or Holographic (EoTech) are really the only way to go if you have a bad astigmatism. Do you actually have astigmatism? If so you would know with uncorrected eyes any holographic looks like a red snowstorm. I have 4 eotechs and an aimpoint and without my glasses they are useless. Amen brother. Eotechs are useless to me. Aimpoints kinda look like a small lightning bolt to me. I can still get decent hits out to 200yrds. The 3x magnifier takes it back to a perfect dot. I have no problem with single red dots, but EoTech's busy reticle is a blurry mess to me. |
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Can someone define astigmatism? Can someone describe astigmatism as it relates to the anatomy of various ocular structures? Can anyone explain why the focusing ring on your scope does not "correct astigmatism?" Why does everyone throw "astigmatism" out when they don't like the flare of brand x's dot? For the record, I have astigmatism, and I don't have problems with eotech, aimpoint, Trijicon, or anyone else. My wife explained it to me, she is an eye tech, but really Google it and it will explain it better than what some can in here with pictures and all. |
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UNLESS you pay lots of money for a toric lens implant. Quoted:
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I have astig in both eyes. But my right eye .. which is my dominant eye has it much worse as gotten alot worse in the last 4 years. Turns out I have a growing cataract in that eye stemming from trauma caused a fist, a baseball and a hackysack to that eye ( in that order ) over time. Doc says that after surgery i should have perfect vision from that eye. Involves replacing the lens with an synthetic one. I am going to see if they cant install a 1x -4x zoom kinda like an Elcan. Until then I will use variable low power scopes for anything over 50 yards. I had both of my lenses replaced. Your new lens will correct the problems caused by the Cataract but will not help your astigmatism which is caused by incorrect curvature of the cornea. Don't be surprised if you must address that also to get that perfect vision. UNLESS you pay lots of money for a toric lens implant. My eye doc informed me that i would have zero or functionally zero astigmatism after the lense replacement as I opted to do the cataract replacement mono with PRK done to the same eye to relieve the astigmatism. Its gonna cost me... but It's my vision and it directly affects my job performance and quality of life. If they can give the medium to long distance vision i had when I was 20... its easily worth a few k to me. Plus all my RDS sights will be awesome again. 
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| Your focus ring does not fix your astigmatism, it just places the"circle of least confusion" within the fovea. Your astigmatism is due to the aspherical nature of the various refracting surfaces of the eye. Your fix must address those issues and can not be fixed externally. |
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Quoted: Your focus ring does not fix your astigmatism, it just places the"circle of least confusion" within the fovea. Your astigmatism is due to the aspherical nature of the various refracting surfaces of the eye. Your fix must address those issues and can not be fixed externally. I'll remember to subscribe now. Ugh
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I am setting my aimpoints in mounts that are set for absolute cowitness. When I look at the dot through the rear sight, it cleans up the dot. When I look at it without the rear sight, the dot is a blur. When your eyes are examined they typically have you look thru a pinhole to see if that improves your vision. This tells them your poor vision is caused by a refractive error that can be corrected with lenses and not some other medical issue with the eye. So it seems you have decreased vision that could be helped. Have you had an eye exam lately? If not get one, you might be surprised how much your vision could be improved. Here is why looking thru the rear sight helps: It is the improper bending of the outermost rays of light which causes refractive errors such as myopia, hyperopia (farsightedness), presbyopia (diminished focusing range with age) and astigmatism to be noticeable. Pinholes can bring about clearer vision in all these conditions. By blocking these peripheral rays, and only letting into the eye those rays which pass through the central portion of the pupil, any refractive error in the lens or cornea is not noticed as much. The pupil may be wide open, but only the central portion is receiving light. The improvement in visual acuity can be striking. |
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