A new azimuthally stable polarimetric method for processing of microscopic images of optically
anisotropic structures of different biological layers blood plasma is proposed. A new model of phase
anisotropy definition of biological tissues by using superposition of Mueller matrices of linear birefringence
and optical activity is proposed. The matrix element M 44 has been chosen as the main information parameter,
which value is independent of rotation angle of both sample and probing beam polarization plane
