1. A method for displaying a computer generated image to a viewer via a stereoscopic display system, the method comprising: establishing a predetermined threshold distance from an eye of the viewer to a threshold displayed position of the computer generated image; determining that a vergence distance from the eye of the viewer to a current displayed position of the computer generated image is at or below the predetermined threshold distance; and based on the vergence distance being at or below the predetermined threshold distance, increasing a size of the computer generated image while maintaining the vergence distance at the predetermined threshold distance as the eye of the viewer moves toward the computer generated image.