Tim,
Not necessarily so!
I know in your mind it's all that simple, but for some of us older folk it aint that way.
I can crank the heck out of either the eyepiece or parallax adjustments, sometimes both, to no avail (well, maybe not quite to no avail, but it only carries things so far).
Before you call me a rookie or something, I've been at this game for 21 years, so have a touch of experience. I know you've got way more years behind a gun than I do, but in this case that really doesn't matter.
I just hope your eyes remain in good condition as it will frustrate the living daylights out of you if/when they start to fail.
Dave
OK try something.
First off, my eyes a probably a lot closer to yours, everbody of a certain age is going through most of the same type eye issues....including me, cataract issues and all.
Unless you have a unique eye issue other than age and loss of eye focus, this can work.
I cannot tell you how frequently this comes up, and at it's core, is improper reticle focus.
You said you crank eyepiece and/or parallax. Unfortunately if you do not properly do the first, the second is nothing but an excercise in futility. Eyepiece is critical....more so when you're older.
You first must, repeat must, look through the scope at a neutral surface like the sky. You must also not look through the scope more than 10 seconds or so, otherwise your eye will adjust and give you an improper reading, so you must constantly look into the eyepiece, then away at something far off or the eye will fool you.
Breifly look at you reticle, if not clear, probably back off the eyepiece until you get resolution. Remember, look into and then away to let your eye relax, using small adjustments.
When you can look into the eyepiece and IMMEDIATELY see a sharp reticle , you are done with the eyepiece and can now go to your parallax adustment when you're on target. Eyepiece first.
Remember as we all age you may verywell need to re do this every few months.
We ave a couple guys in their 80's that always bitched about their focus until they settled down and did it properly.
Remember your eyepiece is like an adjustable pair of glasses, if you can read a paper, ypu can get a sharp reticle.