John Taylor or Chevalier John Taylor has ha liked to be know was an eye surgeon who specialised in curing cataracts. Well cure might be a bit ambitious as he used a process whereby he attempted to push the cataract to the side of the eye and hence improve vision.
This was not a great technique and his cleanliness was not what it should have been which led to a poor success rate but his biggest failures were with two classical composers. John Taylor succeeded in blinding both Handel and JS Bach in fact Bach subsequently died of post operative infection.