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Cross-eyed since early infancy, neurobiologist Susan Barry saw the world in a very different way. Although she had three childhood operations, the pathways in her brain that allow for binocular vision did not develop normally; instead, she saw a flat, 2D world. Over 40 years later, she defied expectation by teaching herself to see in 3D. As Barry publishes her memoir, Fixing My Gaze, Helen Thomson found out how her world took shape

When did you realise that you saw the world differently?

My parents told me that my depth perception might be a little weak, but I didn’t know…

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