C H A P T E R8
OTHER WAYS OF SEEING DOUBLE
In this chapter we will briefly explore a variety of means of seeing more than one image in a single figure.
In “Hermann’s Grid,” when you look at the inter-sections between the purple squares, there appear to be small light purple spots. Similarly, there are light spots at the purple intersections when the color of the squares is reversed. However, if you look directly at any single intersection, the spot disappears. The same is true for the dark lines separating the white squares in the other figure. It has been found that the more inter-sections you have, the stronger the effect becomes. In addition, ...
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