I shoot with both eyes open too but this occluded shooting where you close the cover of the scope or red dot is to prove a point, you don't need to look through the optic to hit at least up close. The Binden aiming concept Trijicon pushes is about the same thing.

I've shot my VX6 1-6 with the cover closed and the fire dot on just like a red dot up close but if you get past 20 yards or so, you'll do much better with the cover open and using the Binden Aiming Concept. The bright dot is the key, it automatically superimposes itself on what you're looking at.

In the dark my Accupower 1-4's work about the same but in daylight, you begin to understand the importance of a daylight bright dot.