When neuroscientist Susan Barry was fifty years old, she took an unforgettable trip to Manhattan. As she emerged from the dark light of the subway into the sunshine, she saw a view of the city that she had observed many times before, but now she saw it in an amazingly new way. The skyscrapers at street corners seemed to protrude towards her like the masts of giant ships. The tree branches spread upward and outward, encompassing and claiming precise volumes of space. The leaves created intricate mosaics in three-dimensional display. With every glance, she felt the indescribable sensation of the complete experience in a three-dimensional world. Barry had strabismus and stereoblindness from early childhood. After half a century of perceiving her environment as flat and compressed, that day she was seeing Manhattan in stereoscopic depth for the first time in her life. As a neuroscientist, she understood how extraordinary this transformation was, not only for her but also for the scientific understanding of the human brain. Scientists had long believed that the brain is plastic only during a "critical period" in early childhood. According to this theory, Barry's brain had been organized when she was a baby to avoid double vision - and there was no way for it to reconnect as an adult. However, Barry found an optometrist who prescribed a lesser-known vision therapy program and after intensive training, she eventually achieved what other scientists and even she herself had once considered impossible. A revelatory narrative of the brain's capacity for change, "Fixing My Gaze" describes Barry's astonishing journey and celebrates the joyful pleasure of our senses.