Embodiments of the present disclosure provide an optical medium, for enabling increase in the viewing field angle without increasing a thickness of a device. The optical medium includes: a substrate having an upper interface and a lower interface parallel to each other; a first anisotropic partially-reflective film and a second anisotropic partially-reflective film being parallel to each other and arranged between the upper interface and the lower interface of the substrate in an inclined way; and a total reflection film arranged within the substrate in a direction of inclination opposite to that of the first and second anisotropic partially-reflective films. Embodiments of the present disclosure further provide glasses including the optical medium and an imaging method for the glasses.