Public review preview. Candidate definitions have not yet been read by the two reviewers. Each entry shows its review status.
biological

Judged: two independent readers; copy check clear.

Hering illusion

Hering illusion The Hering illusion is a visual illusion in which straight lines are seen as bowed.

The Hering illusion is a visual illusion in which straight lines are seen as bowed. In the supplied source, this effect is produced by an optic-flow background, suggesting the visual system can warp perceived space in the context of motion.