Hold the center of the printed image right up to your nose. It should be blurry. Focus as though you are looking through the image into the distance. Very slowly move the image away from your face until the two squares above the image turn into three squares. If you see four squares, move the image farther away from your face until you see three squares. If you see one or two squares, start over! Wallpaper autostereogram is a single 2D image where recognizable patterns are repeated at various intervals to raise or lower each pattern's perceived 3D location in relation to the display surface. Despite the repetition, these are a type of single image autostereogram.

Webber, Ann; Wood, Joanne (November 2005). "Amblyopia - prevalence, natural history, functional effects and treatment". Clinical and Experimental Optometry. 88 (6): 365–375. doi: 10.1111/j.1444-0938.2005.tb05102.x. PMID 16329744. S2CID 39141527. R. Kimmel. (2002) 3D Shape Reconstruction from Autostereograms and Stereo. Journal of Visual Communication and Image Representation, 13:324–333. Tyler, C.W. and Clarke, M.B. (1990) " The Autostereogram". Stereoscopic Displays and Applications, Proc. SPIE Vol. 1258:182–196.McLin, Leon N. Jr; Schor, Clifton M. (1988). "Voluntary effort as a stimulus to accommodation and vergence". Investigative Ophthalmology & Visual Science. 29 (11): 1739–1746. PMID 3182206. People with amblyopia (also known as lazy eye) are unable to see the three-dimensional images. Children with poor or dysfunctional eyesight during a critical period in childhood may grow up stereoblind, as their brains are not stimulated by stereo images during the critical period. If such a vision problem is not corrected in early childhood, the damage becomes permanent and the adult will never be able to see autostereograms. [3] [c] It is estimated that some 1 percent to 5 percent of the population is affected by amblyopia. [25] 3D perception [ edit ] The next day, Gregorek called up Baccei and told him that he wanted to make him rich. Courtesy of Ron Labbe/Studio 3D Not every person can see the 3D illusion in autostereograms. Because autostereograms are constructed based on stereo vision, persons with a variety of visual impairments, even those affecting only one eye, are unable to see the three-dimensional images.

Ione, Amy (2005). Innovation and Visualization: Trajectories, Strategies, and Myths. Rodopi. p.211. ISBN 90-420-1675-2 . Retrieved 2013-07-02. Brewster, David (1844). "On the knowledge of distance given by binocular vision" (PDF). Transactions of the Royal Society of Edinburgh. 15: 663–674, Plate 17. doi: 10.1017/S0080456800030246. S2CID 121080550.

Delivery with Standard Australia Post usually happens within 2-10 business days from time of dispatch. Please be aware that the delivery time frame may vary according to the area of delivery and due to various reasons, the delivery may take longer than the original estimated timeframe. This autostereogram displays patterns on three different planes by repeating the patterns at different spacings. ( )