The monograph is devoted to the recently discovered effect in the focus of laser light - the optical Hall effect, which is based on the phenomenon of transverse displacement (in different directions) in the magnetic field of charges of different sign or different spins carrying electric current. In optics, particles with different spin correspond to light beams with left and right circular polarization, so the optical Hall effect in focus consists in the formation of spatially separated regions in which light has a different direction of elliptical or circular polarization.