Astigmatism and scope question

[problemchild]

One last question. Have you properly focused the diopter adjustment for the crosshair properly? Some people don't know how to do this. Reticle focus and target focus are two different things.

To properly focus your crosshair for your eye, you look throught the scope at a blank white wall. You look at your crosshair only and focus the diopter on the eyepiece (rotating it clockwise or counter clockwise) until the crosshair is in focus. DON'T LOOK AT THE WALL! LOOK AT THE CROSSHAIR.

After adjusting the crosshair focus, You can then move the scope to a distant target and then adjust your TARGET focus with the focus knob on the scope at the 9 O'clock position.

I was helping a shooter on our team one morning. He wasn't getting good groups and didn't know what was wrong. I looked through his scope and the diopter(crosshair focus ) was way out of focus. I adjusted it until he could see the crosshair clearly. That was all it was.

You may have done this already, but I thought I'd take a chance and ask.
Just remember,the diopter focus for your eye will be different than your Buddy's eyesight.

When I shoot my friend's Tac Ops Echo with his S & B 5X25X56 P II, I have to rotate the diopter(eyepiece) 1/4 turn or so to get the crosshair in focus for me. After I shoot, I rotate it back to his position.

I hope this helps you.

I will try this and post back.

[problemchild]

OK I adjusted my diopter for scope use without my glasses. Im afraid the diopter needs to go in about 1/2 turn more then it allows. I hit the stop before I get a crystal clear reticle. Also when I adjust for parallax at a know distance the target is fuzzy.

I guess I need to shoot with my glasses on huh?

[bruce_ventura]

I guess I need to shoot with my glasses on huh?

Uh... yea. I asked you this question in my first post. Starting off with corrected vision is fundamental to good shooting.

The diopter adjustment can only correct for myopia/hyperopia, not astigmatism. It sounds like you have a pretty strong prescription, with a combination of astigmatism and focus correction.

If you're over fifty and haven't had a vision exam in two years, you should get a thorough retinal exam and a new pair of glasses. Shooting high power rifles may put you at higher risk of a detached vitreous humor or detached retina (no conclusive data either way, but why take the risk?).

[problemchild]

Uh... yea. I asked you this question in my first post. Starting off with corrected vision is fundamental to good shooting.

The diopter adjustment can only correct for myopia/hyperopia, not astigmatism. It sounds like you have a pretty strong prescription, with a combination of astigmatism and focus correction.

If you're over fifty and haven't had a vision exam in two years, you should get a thorough retinal exam and a new pair of glasses. Shooting high power rifles may put you at higher risk of a detached vitreous humor or detached retina (no conclusive data either way, but why take the risk?).

I had an exam 4 mo's ago. Sorry I forgot to comment on your post. I have a pair of maui jim polarized glasses that cost a fortune. Very high quality. I also have a pair of Zeiss clear glasses for night driving.

[bruce_ventura]

I'm not sure what your point is. Unless the maui jim or Zeiss glasses have your prescription, use your regular prescription glasses for shooting instead.

[problemchild]

I'm not sure what your point is. Unless the maui jim or Zeiss glasses have your prescription, use your regular prescription glasses for shooting instead.

Yes they are prescription

[anderson01]

When I lived on Kodiak - I was lucky the local eye doc was also a high power rifle shooter and set me up with a set of glasses specifically for shooting. Today - my new doc is also a shooter, and, when I explain to him exactly which part of the lens I use for shooting, he has tweaked my perscription.

I would recommend you ask around and see if you can find a doc that is also a shooter - and you will probably find them more responsive to your needs.

That - and as you get older, the eye are the first to go. You didnt mention your age - but - from your discription, the days of you buying a scope or sight over the internet are over. You need to get some hands on time before buying.

Most of the additional cost in these better reflex sights are the size of the lenses and coatings. These optics have stronger metalic coatings that take more abuse, and, provide less glare. You certianly can tell the difference between an inexpensive one and high end one if you spend time looking through them allot - most people dont. I have no idea if one would make you less sensitive to astigmatism than another - but - it's an awesome question for you eye doc, and, it would be a very good idea for you to bring one or two relfex sights to show the doc.

[kcheung2]

I don't know if this is a record necropost, but it sure is top 10.

[G38xOC]

back from dead top 10 for sure lol

[DBA]

I think I've developed an astigmatism since the OP.

[CSTactical]

Astigmatism is why I'm deciding to dump my T-2 for for an EXPS 3-0, I've been debating it back and forth and I'm 99% sure as of right now.

[k1dude]

Astigmatism is why I'm deciding to dump my T-2 for for an EXPS 3-0, I've been debating it back and forth and I'm 99% sure as of right now.

I've found EoTech's are WAAAAY worse than a red dot for my astigmatism. The EoTech reticle looks like a giant fuzzy mass of wriggling worms. I had to put it on a home defense shotgun where precision wasn't important.

Everyone's eyes are different. So YMMV. I suggest going to a store and looking through an EoTech before buying just to make sure it works for you.

[CSTactical]

I've found EoTech's are WAAAAY worse than a red dot for my astigmatism. The EoTech reticle looks like a giant fuzzy mass of wriggling worms. I had to put it on a home defense shotgun where precision wasn't important.

Everyone's eyes are different. So YMMV. I suggest going to a store and looking through an EoTech before buying just to make sure it works for you.

Aimpoint's look like a comet to me, the newest Micro's have the least distortion. Eotech's are not distorted but they do have that odd holographic spotting/texture in the ring but that's just how they are normally.

[Carcassonne]

Hmmm

So why would my POI be hopping all over when my crosshairs never leave the center?

Most likely parallax.

That is one reason why I hate scopes, but my crappy eyesight now forces me to start using one.

.