  The perception-related origins of physical measures and standards are
considered within the framework of the general observer theory. The impact of
observer characteristics on the development of observer-centric physics,
physical concepts and metrics are analyzed. A preliminary theoretical approach
is suggested for the construction of a general observer theory and formulation
of its relationship to observer-centered physical concepts and theories. The
approach makes it possible to construct a theory of the observer, intrinsic in
any theory of physics.
