Judged: two independent readers; copy check clear.
stereogram
stereogram A stereogram is a pair of images presented separately to the left and right eyes so that depth can be perceived from their differences.
A stereogram is a pair of images presented separately to the left and right eyes so that depth can be perceived from their differences. In the random-dot form described here, reversing the light-dark pattern between the two eyes creates an anti-correlated stereogram, which did not produce depth perception in the cited observations.