Pete, . . . it may not work for you, . . . or you may not have time to devote to it, . . . but if you have the time it may work for you.
Take a pair of your glasses (use clear shooting glasses if you don't wear lenses), . . . and put several layers of colored celophane on the left lens, . . . enough that it makes it difficult for you to focus with your left eye.
You may begin to rely on your right eye while doing this, . . . and this is the desired result.
Do this while dry firing, . . . unholstering, . . . sweeping the perimeter, . . . all the things you normally do with your handgun.
As you notice yourself becoming more reliant on the right eye, . . . peel off the layers of celophane until you get to the clear lens. Then take the glasses off and you will find you are shooting right hand, right eye, and best of all, . . . you are shooting with both eyes open: a definite advantage when shooting skills are needed to save your bacon.
My left eye has better vision than my right, . . . and is somewhat far sighted, while my right eye is somewhat nearsighted, . . . giving me the best of both worlds when I shoot with both eyes open. That is your real goal.
There was another thread on here or on 1911.com, . . . where the writer suggested shooting with both eyes open, . . . but placing the weapon in front of you in such a manner to allow each eye to only see what is on its side of the gun, . . . and you obviously shoot between what you are seeing straight ahead of you with each individual eye. Supposedly, . . . it works for some, . . . I just couldn't get used to it, . . . though I like the concept.
May God bless,
Dwight