Which instrument is used to sterilize surgical implements using pressurized steam?

The correct response is the autoclave, which is specifically designed to sterilize surgical instruments through the use of pressurized steam. The process involves reaching a high temperature of around 121 to 134 degrees Celsius, which effectively kills bacteria, viruses, and spores that could contaminate surgical tools. This method is particularly effective because the high pressure raises the boiling point of water, allowing steam to penetrate more thoroughly and uniformly into all surfaces of the instruments being sterilized.

Other instruments listed serve different functions in an ophthalmic setting. A keratome, for instance, is a surgical instrument used to make incisions in the cornea, while a tonometer measures intraocular pressure, and a curet is used for scraping tissue. These tools do not possess the capabilities to sterilize instruments; rather, they are utilized directly during surgical procedures or examinations. The autoclave, on the other hand, is crucial in maintaining a sterile environment essential for safe surgical practices, making it the correct answer.