A gaming machine is provided including a display unit configured to generate video images, an input unit, an ambient light sensor, and a controller coupled to the display unit, input unit, and ambient light sensor. The controller is configured to receive physical characteristics of a player via the input unit, determine an ambient light level of an environment of the gaming machine based on a signal generated by the ambient light sensor, determine a desired brightness level for video images based on the determined ambient light level, determine a desired contrast level for the video images based on the received physical characteristics or the determined ambient light level, generate display settings for the video images based on the determined brightness level and the determined contrast level, and display the graphics to the player via the display unit using the generated display settings.