I'm running a EOTech mounted just ahead of BUIS's, shooting both eyes open, and all is well. But, at some point, isn't eye dominance (left eye dominate, right handed shooter, or reverse.) going to play a part in where the optic will best be located? Just wondering.
The dot should simply be a stable part of whats in your field of vision with both eyes open and not a separate part that you need to specifically focus on or "hunt". A 1x RDS with unlimited eye relief, for both eyes open use, is based upon a optimal balanced vision concept with both eyes in the same plane at the same time.
Let me see if I can explain all this correctly below, I don't have the actual training documents with me right now so this is from memory;
To be frank, approximately half of the population in the U.S. would not be able to achieve that perfectly with a RDS. Its because perfect both eye open use of a RDS needs optimal vision in both eyes to be balanced the same and about half the population doesn't have the same balanced vision in both eyes. Sometimes its correctable by glasses, contacts, surgery like lasik, or maybe other methods. Shooters generally tend to have better vision than about half the population, or have vision thats already been corrected by some method. Some people never notice the difference because they unconsciously have trained theirselves over time through life to seemlessly compensate that it doesn't seem any different and they are not even aware they do this. Some people can "train" theirselves to do it by learning how to seemlessly and automatically concentrate a little harder with the weaker eye more than the other.
This is not to say that people without balanced optimal vision in both eyes can't use such a sight effectively with both eyes open, because they can if they allow for compensations they may not already have or be using or learn to use it. However, there are those that simply can't do it with both eyes open no matter what they try and its probably not their fault but rather that they simply do not have the natural capability for such just as there are people who, for example, can not view all the 3D aspects fully of 3D movies with those red/green-blue 3D glasses things. The majority of shooters will probably use the Eotech fine with both eyes open once they get the hang of it. When you hear people say (or see people post stuff on the internet) something about not being able to use an EoTech and prefering a tubed type RDS like an Aimpoint, plenty of times this is because they don't have that natural optimum balanced vision or the ability to compensate and they do not even realize it because the rest of the world vision wise looks and is perfectly normal to them and always has been and when they use a dominate eye sighting device (e.g. magnified optics such as a scope or iron sights) everything is perfectly normal for them. For these people, although they may not know it, they tend to prefer the tubed type in this aspect because their dominate eye can play more of a part in helping them compensate because eye alignment thru a tubed sight by virtue of its construction is in the same plane line with where the dot is located in the tubed sight and because the eye will naturally tend to seek the center of a circle. The more dominate eye is tending to seek the center of the round tube rear circle automatically which is where the dot appears located. Then, some people just simply prefer a tubed type of RDS regardless of vision.
For a sight like the EoTech, eye dominace should not play a part for vertical mounting on the top plane of the weapon for both eye open use with the eyes in the same plane with the sight over the upper receiver, unless the person simply can not maintain the dot properly with both eyes open then they have a tendency to use the dominate eye more. If the Eotech sight (and tubed sights also) is mounted too far forward from the both eyes open position for the person then eye dominance may begin to play more of a role depending on the persons vision. For the balanced vision person able to use both eyes open, too far forward for the tubed sight and the dominate eye tries to take over naturally while the Eotech is still able to provide both eyes open aiming without a tendancy for the dominate eye to take over although too far forward for some and they have a tendency to shift to dominate eye use. Of course on offset types of mounting, for example mounting at 45 degrees or 90 degrees from vertical, the dominate eye can have more of an effect as the shooter shifts focus from the top weapon plane to the offset plane.
). So I found the red/green dot helps get on target faster and adjusted it to match my iron sights.I still prefer a good scope. But the red dots add a new perspective to iron sights. I'd like to see a future red dot with range & windage dots/lines like some of my higher end scopes. Built in range finder would be nice too. But now we're talking BIG $$$$.
