We have found out that the physical world itself is not real; it becomes real by observation. This coincides with a very basic phenomenon that is often overlooked. When talking about science, we talk a bout the physical world from an objective point of view, let's say from a neutral third person perspective. However we have never experienced the world in an objective way. We always see the world from a certain point of view. And this is what the world in fact is; it is subjective. The world is no objective reality. It is a subjective reality. We create it originating from our point of view, simply by viewing it. Therefore we are not observers moving around in a real existing objective world; the world is instead the rather undefined field of possibilities between the countless subjective fields of reality that we create around us. The size of this field of reality, which surrounds us, is limited by the range of our perception. The space where these fields of reality of different observers touch each other is the field of intersubjective reality.
The blurred space between the different fields of subjective reality created by the observers is in a non-real, undefined state, whose possibilities are determined by the wave function in order to prevent contradictory events in the fields of reality, where the wave function collapses into distinct states. So when subjective fields of reality merge into an intersubjective field of reality, it can never happen that the observers create contradictory events by their observation. As soon as the wave function has collapsed, it has a clearly defined state. The observation by a second observer doesn't have any influence on this state anymore. So both observers always see the same, and every observation they make in their subjective field of reality is consistent with the subjective field of reality of any other observer. Observers don't create reality in an arbitrary way, they simply make the wave function collapse into one possible state, which is described by the Schrödinger equation.