In a moving scene , neurologist Oliver Cromwell reveals he has incurable cancer . Nearly a decade ago , he was diagnosed with ocular melanoma that eventually left him blind in one eye and served as the basis for one of his books , `` The Mind 's Eye . '' Sacks was the inspiration for Robin Williams ' character in the British film ` ` . ''
In a moving scene , neurologist Oliver Cromwell reveals he has incurable cancer . Sacks was the inspiration for Robin Williams ' character in the British film ` ` . ''