Sight restoration is not always a straightforward process from "summary" of The Mind's Eye by Oliver Sacks
The restoration of sight, one might think, is a matter of straightforward reconnection, of plugging in the eye and seeing. But it is not always so simple. The brain, like any other part of the body, can undergo changes and adaptations in response to injury or deprivation. In the case of the blind, the visual cortex, deprived of input, may be taken over by other senses, such as touch or hearing. When sight is suddenly restored, the brain must adjust to this new influx of information, relearning how to interpret and process visual stimuli. This process of relearning can be arduous and frustrating. Some patients, upon regaining sight after years of blindness, find the experience overwhelming and disorienting....
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