An image display device includes: a display device provided with pixels serving as light sources; a memory that stores computer executable instructions; and a processor that executes the computer executable instructions to perform operations, comprising: detecting a line of sight of a user; rendering, in the display device, a stereoscopic image according to the detected line of sight; identifying an unnecessary light source range of light sources for an optical crosstalk which is emitted from the light sources other than those for the stereoscopic image and which passes through a position of the stereoscopic image; identifying, in the unnecessary light source range, the light source pixels for the optical crosstalk; and performing a predetermined processing with respect to the identified light source pixels or the light beams emitted therefrom to prevent the emitted light beams from passing through the position of the stereoscopic image.