Ok ... this may sound stupid ... Close your left eye!
I have nearly identical vision in both eyes, and with specs it is still nearly equal. What does that mean? When I shoot with both eyes open at some time along the way my eyes will fight for dominance. The only thing I can do is squint down with the left or close it all together. I have used opaque covers and tape over the left lens, but in a real world situation or in USPSA it is not an option. So, I have just learned how to regulate the goofiness of the balance in my vision.
God made us in His image, but not with all of His standard equipment. Because of this we must learn to live with what we have until we are perfect!