  We consider a deviation of the physical length from the Riemann geometry
toward the Randers'. We construct a consistent second-order relativistic theory
of gravity that dynamically reduces to the Einstein-Hilbert theory for the
strong and Newtonian gravity while its weak gravitational regime reproduces
MOND and the gravitational lensing attributed to the dark matter halo. It also
naturally accommodates the observed value of the cosmological constant. We show
that it predicts a few percent deviation for the post Newtonian parameter
$\gamma$ in a part of the regime that interpolates the Newtonian regime to the
MOND regime. The deviation is consistent with the reported observations but can
possibly be detected by fine-tuned refinements of the current data or specified
future observations.
