In the sentence provided, 'contrived' signifies that the picture was skillfully crafted to make the eyes appear as if they are following the observer.
Contrived in the sentence "It was one of those pictures which are so contrived that the eyes follow you about when you move" means that the picture was cleverly designed or created in a way that gives the illusion of the eyes following the viewer. The word is used to describe the specific type of picture that has been intentionally crafted to create this effect, emphasizing the artifice and ingenuity behind its creation.
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