I have better than 10/20 in both eyes, with my right eye being only minorly dominant. When I try to keep both eyes open with magnifying optics, it really screws with my head. As such, I prefer a zero power or a traditional style scope.I have both. The Trijicon 4 x 32 ACOG is on a longer range rifle (20" AR-15), and the EOTechs are on shorter range (16" M-4 and AK) rifles. The Trijicon ACOG is also sight that you can use with both eyes wide open.