1. An image display apparatus that allows recognition of a stereoscopic image based on binocular parallax, the apparatus comprising: a display unit that displays an image for the left eye and an image for the right eye; an instruction input unit that receives instruction operation by which an area in the stereoscopic image is instructed; and an image adjustment unit that adjusts the amount of parallax in the area instructed by the instruction operation and the amount of parallax in an area outside the instructed area using different amounts of adjustment.