In corneal transplant, also known as keratoplasty, a patient's damaged cornea is replaced by the cornea from the eye of a human cadaver. This is the most common type of human transplant surgery and has the highest success rate...
the eye is held open with a speculum. A laser is used to make an initial cut in the existing cornea. The surgeon uses scissors to remove it, and a donor cornea is placed. It is stitched with very fine sutures.

Swift took a variety of useless medication for his 'giddiness.' These included asafoetida, the herb so foul-smelling that it is known as devil's dung, as well as 'nasty steel drops' (a crude iron supplement). Swift also took something that he called 'a vomit.' This vile treatment was based on the ancient Galenic theory of ridding the body of evil humours. It could have been one of many drugs, ranging from the merely unpleasant (ipecac) to the potentially toxic (arsenic or antimony). Had Swift taken arsenic or antimony only rarely, he probably would not have had long-term side effects, as most of the dose would have quickly left the body in the urine and from both ends of the gastrointestinal tract. His doctor pal John Arbuthnot prescribed confection of alkermes (a scarlet syrup in which the active ingredient was crushed parasitic insects), the vigorous laxative castor oil, and cinnabar of antimony (mercuric sulphide). Swift thought the cinnabar helped. This is just possible: some mercury compounds are mild diuretics.

for a variety of reasons it has proven difficult to anaesthetize hippopotamuses. The thick skin and the dense subcutaneous tissue make it difficult to introduce sufficient amounts of anesthetics and opioid-based anesthetics often cause breathing irregularities and occasionally even death. In addition, the level of anesthesia is only rarely sufficient to enable surgery to be undertaken: few vets wish to be around when a drugged hippopotamus starts to wake up.