dewey -
Make sure to keep us updated. I had an accident when I was a kid, and the doctor said I'd be losing sight in my dominant eye (my left) in my 30's. Now I'm 30, and dang if the doc wasn't right - I see my sight starting to blur in my left eye while my right keeps a good 20/15.
I've been combatting it much the same way as most instructors would tell you to shoot - concentrate HARD on the front sight and those 2 or 3 pistols' rear sights will fall right into place.
For quick acquisition without using the sights as much, keep a daily/weekly check on your eye dominance and go with it. When you see the 2 or 3 pistols, use the one closest to your dominant eye, even if it's the bad eye. You'll be looking at the gun at an angle, but you'll get used to where to point it at 25 yards and less.
On the good side, rifle shootin will be a breeze in comparison. Start practicin to be a southpaw with a rifle, it's easier to pick up than you think it is.
Also, on the plus side, using your 'weak' side will be your strongest point in rifle shooting. You'll find you concentrate better on the proper shooting techniques when using your weak side. If you're anything at all like me, you'll be more accurate.
Make sure, though, to study up on the proper rifle shooting techniques as taught by military snipers and long range high power rifle shooters. You have an opportunity now to completely re-teach yourself the absolute textbook-perfect shooting techniques on a clean slate, with no old habits to unlearn (except for the obvious - shooting weakside!
).
Good luck with it. It'll be much easier than you might think, as long you use the proper techniques. You might lose a little depth perception, so don't bump into any doors (like I will be doing in soon years to come...) !