Among the physicians, were specialists such as surgeons, ophthalmologists, orthopedics, oculists and future physicians. The Notebook of the Oculists was widely used by European physicians for hundreds of years. The Oculists used sight as a metaphor for knowledge. His famous Notebook of the Oculists combined information obtained from both Greco-Roman and Arab sources. The Oculists were a group of ophthalmologists led by , who died in April 1775. He consulted oculists in Paris and London, but no disease was visible in his eyes.