John Taylor (oculist)
He arrived at Leipzig on 27 March 1750. On 1 April, he did surgery on Johann Sebastian Bach. Bach had eye problems in his old age. The problems were probably myopia and cataract. The newspapers at the time said that the first surgery was successful. However, Bach's cataract appeared again after around a week. Taylor did surgery again on him. Bach went blind after the second surgery. The blindness could have been caused by Taylor's surgery. Bach died on 28 July 1750.