A head mounted display device, comprising: a processor; a stereoscopic display; a memory having computer-executable instructions stored thereupon which, when executed by the processor of the head mounted display, cause the head mounted display device to: cause a display of a first image of an object and a second image of the object on the stereoscopic display, wherein the first image is along a line of sight with a first eye of a user, wherein the second image is along a line of sight with a second eye of the user; obtain a vergence distance of the object; obtain a distance to a focal plane; determine that if a difference between the vergence distance and the distance to the focal plane exceeds a threshold; and modify a contrast property of one image of the first image and the second image, in response to determining that the difference between the vergence distance and the distance to the focal plane exceeds the threshold, and determining a contrast ratio between an object in each of the first image and the second image and the object's background to determine which image to modify; wherein modifying the contrast property of the one image obscures the display of the object to an eye of the user corresponding to the one image, based on the contrast ratio, for the purposes of reducing eyestrain. a processor; a stereoscopic display; a memory having computer-executable instructions stored thereupon which, when executed by the processor of the head mounted display, cause the head mounted display device to: cause a display of a first image of an object and a second image of the object on the stereoscopic display, wherein the first image is along a line of sight with a first eye of a user, wherein the second image is along a line of sight with a second eye of the user; obtain a vergence distance of the object; obtain a distance to a focal plane; determine that if a difference between the vergence distance and the distance to the focal plane exceeds a threshold; and modify a contrast property of one image of the first image and the second image, in response to determining that the difference between the vergence distance and the distance to the focal plane exceeds the threshold, and cause a display of a first image of an object and a second image of the object on the stereoscopic display, wherein the first image is along a line of sight with a first eye of a user, wherein the second image is along a line of sight with a second eye of the user; obtain a vergence distance of the object; obtain a distance to a focal plane; determine that if a difference between the vergence distance and the distance to the focal plane exceeds a threshold; and modify a contrast property of one image of the first image and the second image, in response to determining that the difference between the vergence distance and the distance to the focal plane exceeds the threshold, and determining a contrast ratio between an object in each of the first image and the second image and the object's background to determine which image to modify; wherein modifying the contrast property of the one image obscures the display of the object to an eye of the user corresponding to the one image, based on the contrast ratio, for the purposes of reducing eyestrain. <EOS>