Barrier-grid animation and stereography

**Barrier-grid animation** refers to a technique used in animation and visual displays where a grid of barriers (often vertical or horizontal slits) is placed in front of an image or display. It allows each eye to see different images by controlling the light that reaches each eye. This technique can be used to create the illusion of depth or to present 3D content. The barrier grid effectively filters the light so that the left eye sees one image while the right eye sees a different image.