A method of modifying an image on a computational device and a system for implementing the method is disclosed. The method comprising the steps of: providing image data representative of at least a portion of a three-dimensional scene, the scene being visible to a human observer from a viewing point when fixating on a visual fixation point within the scene; displaying an image by rendering the image data on a display device; capturing user input by user input capturing means; modifying the image by: computationally isolating a fixation region within the image, the fixation region being defined by a subset of image data representing an image object within the image, wherein the image object is associated with the visual fixation point; spatially reconstructing the subset of image data to computationally expand the fixation region; spatially reconstructing remaining image data relative to the subset of image data to computationally compress a peripheral region of the image relative to the fixation region in a progressive fashion as a function of a distance from the fixation region, wherein the modification of the image is modulated by the user input such that a modified image is produced which synthetically emulates how the human observer would perceive the three-dimensional scene.