A display apparatus, comprising: a monitor; a display video information input unit operable to receive display video information of video displayed in the monitor; a camera; a user video information input unit operable to receive user video information, acquired by the camera, of a user watching video displayed in the monitor; a sight line detection unit operable to detect a line of sight of the user by analyzing the user video information received by the user video information input unit; an enhancement processing unit operable to detect an intersection point of the line of sight of the user detected by the sight line detection unit and a video display surface of the monitor as an attention point and further configured to perform enhancement processing for the monitor by performing enhancement in stages among a plurality of regions within said video display surface including a region containing the attention point and a region not containing the attention point; and a display video output control unit operable to output video via the monitor based on the enhancement performed by the enhancement processing unit and the display video information received by the display video information input unit; characterized in that: the enhancement processing unit is configured: to perform said enhancement by setting a higher enhancement gain amount in stages among a plurality of regions divided by one or a plurality of concentric circles around the attention point within said video display surface, from the region of a longer distance from the attention point toward the region of a smaller distance, to set the gain amount for each region, each region being defined by a radius of the one concentric circle or each of the plurality of concentric circles by successively increasing the distance from the attention point by an increment of a predetermined length, and to define the predetermined length as being equal to or less than the distance between adjacent pixels constituting the monitor. a monitor; a display video information input unit operable to receive display video information of video displayed in the monitor; a camera; a user video information input unit operable to receive user video information, acquired by the camera, of a user watching video displayed in the monitor; a sight line detection unit operable to detect a line of sight of the user by analyzing the user video information received by the user video information input unit; an enhancement processing unit operable to detect an intersection point of the line of sight of the user detected by the sight line detection unit and a video display surface of the monitor as an attention point and further configured to perform enhancement processing for the monitor by performing enhancement in stages among a plurality of regions within said video display surface including a region containing the attention point and a region not containing the attention point; and a display video output control unit operable to output video via the monitor based on the enhancement performed by the enhancement processing unit and the display video information received by the display video information input unit; characterized in that: the enhancement processing unit is configured: to perform said enhancement by setting a higher enhancement gain amount in stages among a plurality of regions divided by one or a plurality of concentric circles around the attention point within said video display surface, from the region of a longer distance from the attention point toward the region of a smaller distance, to set the gain amount for each region, each region being defined by a radius of the one concentric circle or each of the plurality of concentric circles by successively increasing the distance from the attention point by an increment of a predetermined length, and to define the predetermined length as being equal to or less than the distance between adjacent pixels constituting the monitor. to perform said enhancement by setting a higher enhancement gain amount in stages among a plurality of regions divided by one or a plurality of concentric circles around the attention point within said video display surface, from the region of a longer distance from the attention point toward the region of a smaller distance, to set the gain amount for each region, each region being defined by a radius of the one concentric circle or each of the plurality of concentric circles by successively increasing the distance from the attention point by an increment of a predetermined length, and to define the predetermined length as being equal to or less than the distance between adjacent pixels constituting the monitor.