A sun visor assembly for a vehicle includes a front transparent glass substrate having first and second surfaces and a rear transparent glass substrate having third and fourth surfaces, with an electro-optic medium sandwiched between the second surface of the front glass substrate and the third surface of the rear glass substrate. A vanity mirror including a mirror reflector is established at one of (i) the first surface of the front glass substrate and (ii) the second surface of the front glass substrate. When not electrically powered, the electro-optic medium is substantially transparent, and when electrically powered, the electro-optic medium is darkened so as to have reduced light transmission. When the electro-optic medium behind the mirror reflector is darkened, the mirror reflector is usable as a vanity mirror by a user of the sun visor.