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Square eyes and plastic brains

It is Saturday morning and my friend Bob strides purposefully in from the garden to flush out his two children from the room where they have been watching television since dawn. “Come on you two, you'll get square eyes if you stay here any longer,” he cliches in the style unique to parents of young children. Her eyes not leaving Power Rangers for a millisecond, his precocious 6 year old daughter murmurs sweetly and reassuringly, “It's all right daddy, every now and again we turn and look at the round doorknob.” A subdued father closes the door quietly behind him and returns obediently to his weeds.

Before considering the neurological significance …