English: Depiction of vergence & focus when viewing autostereograms, as if from above. Cross-eyed vergence: both eyes focused on different objects at a shorter distance than the objects are from the viewer (focused in front of the objects, thus eyes crossed). Vergence is in front of focus.
The empty circle is one's head, the black circles are one's eyes, the dashed line is the pattern on the page, and the solid lines are one's lines of sight (vergence). The arrow indicates one's accommodation.
See: Stephen M. Kosslyn, Daniel N. Osherson (1995). An Invitation to Cognitive Science, 2nd Edition - Vol. 2: Visual Cognition, p.65 fig. 1.49. ISBN9780262150422.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.