Obsidian - a type of volcanic glass - can produce cutting edges many times finer than even the best steel scalpels.Īt 30 angstroms - a unit of measurement equal to one hundred millionth of a centimeter - an obsidian scalpel can rival diamond in the fineness of its edge. It could even have been a form of emergency surgery for battle wounds.īut while there is still conjecture about the real reasons behind the mysterious procedure, what is known is that the implement often used to carry out the primitive surgery was made from one of the sharpest substances found in nature - obsidian. In Neolithic times trepanation - or drilling a hole into the skull - was thought to be a cure for everything from epilepsy to migraines.Products and services from the categories Ophthalmic eye knives and ophthalmic eye scalpels in medical technology or other healthcare-related industries. The history of eye scalpels dates back to the 1860s. In this time, ophthalmologists made huge advances in the field of eye surgery. First, the operative treatment for glaucoma (an abnormally high pressure in the eye) was introduced. Cocaine was also introduced as a local anaesthetic during surgery. Now, you can easily find a great variety of these instruments in the market. These instruments are made of ivory and are typically used in eye surgeries. Unlike other surgical instruments, eye surgeons use a microkeratome to cut the initial flap in the cornea. The excimer laser reshapes the cornea with light pulses a billion times faster than a camera flash. The femtosecond laser is another type of surgical tool that is being developed. It is the first device of its kind to cut an incision in the cornea. The first eye surgeons used an ivory-handled scalpel called John Weiss in 1870. The nineteenth century saw tremendous advancements in eye surgery. The first operative treatment for glaucoma was developed during this time. This disease affects the pressure in the eye and can cause blindness. It also saw the use of cocaine as a local anaesthetic, which made eye surgeons use the instruments with great care. While a small camera captures the autofluorescence, the images are cycled through a computer.
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