First, do you shoot left from a rest? (Use sandbags, rice bags, etc.) And squeeze the shot of very slowly. That will show whether its the sights misadjusted or technique.
Second, for most of us, having glasses that will let you see the SIGHTS very clearly -- maybe cheap reading glasses from the drug store -- may be your best alternative. (That's what my eye doctor, an opthamologist recommended.)
Until my last eye visit, I had a special set of glasses with the right lense (my dominant eye) set so that I could focus on the front sight, and my left set for the distant target. I'd use the left eye to acquire, and the right eye to "set." But my left eye has a small cataract right in the middle, and its thrown everything off. Now I just use reading glasses.
Its far more important to see the sight clearly than to see the target clearly.
