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View Full Version : Blurry scope or vision question, had eye surgery


8shot
10-18-2006, 09:12 PM
Not to ramble on, I am in my mid 50's, had torn my retina (3 places) in my shooting eye a couple years back. It was repaired with laser surgery, but has never been 100% since.

In last few years, my ability with iron sights with both rifles and handguns has suffered (crisp is long gone). I finally broke down and installed optical sights and have had really great results with the 1X red dot type scopes.

Just took out my old deer rifle that had a Burris 4X mini scope installed before my surgery. It worked great back then, now the duplex cross hairs appeared blurry...take off my corrective lenses.."and everything is crisp again"! I did some excellent shooting today without glasses, but need them to spot the deer! I tried to adjust the scope lense to help with my glasses..but no improvement at all. (I need glasses for distance.) Looking through either the regular lense or lower bifocal..it's the same...blurry.

I also took out my shotgun with a BSA Deer Hunter 2.5X20 scope and it's now the same condition, blurry!

Looking through my other rifle scope; a BSA 3-12X50 and everything is crisp..the same as the other two scopes used to be???

Could the smaller field of view be the culprit with my blurry cross hairs?

BTW: My sons say that the "duplex cross hairs" on all three scopes look clear and crisp to them.

Thanks

Gismo
10-18-2006, 10:04 PM
I wear bifocals, and need to adjust my eye piece on all my scopes to get the cross hairs clear. You may have to do alot of cranking on the eye piece. It has very fine threads and may need to be adjusted farther than you think. Keep trying and see if you can get it.

kdub
10-18-2006, 10:15 PM
Sounds like its time for ShootinIdoc to once again don his red cape and come to the rescue! :D

Jack Monteith
10-18-2006, 10:16 PM
ShootinIdoc explains all on the 2nd page of this thread.
http://www.shootersforum.com/showthread.htm?t=33183

Bye
Jack

jimbogolf
10-25-2006, 08:18 PM
Hard to talk after a doc, however, for what its worth, you may be able to refocus the two plains of vision in your scope. Most scopes are not parallax free until 100yds. so make sure that your tring to view crisp reticles at a crisp target. The adjustable objective lens will correct the image of the target (object) if you have an adj. on the scope. If not, just try to adjust reticles at 100yds. The eye piece will adj. the focus of the reticles on that viewing plain. You may be able to refocus your scope to your new old vision. Hope you dont need more eye work ,Jim

shootinIdoc
10-30-2006, 08:28 AM
8shot, you will need to adjust focus of your scopes. You have divergent light exiting your scopes. Your sons can focus through it with their own eyes and therefore see things sharply; you can no longer focus enough and therefore have blur. Put the rifles in a rest and aim the scope at blue sky to ensure you are getting light rays from optical infinity coming into the objective lens. The reticle should be blurry with the glasses. Turn the eye piece out toward your eye until it is clear, then continue turning it until it blurs again. Then turn it back in until the reticle is in sharp focus. You will now have parallel light rays entering and exiting, and will have focused the scope (assuming your glasses are the proper Rx). A side note and something we all should know (especially very near-sighted people), recoil will cause retinal tears and breaks that will lead to detachements. Since you have already had repairs, you have an extra fragile retina and should limit the amount of recoil from rifles and shotguns you are subjecting yourself too. Handguns are different because the arms and body soak up the recoil. If still using hard kickers, consider a change.

Idoc