MARK THOMAS / SCIENCE PHOTO LIBRARY MARK THOMAS / SCIENCE PHOTO LIBRARY
This device was introduced by Arthur Von Hippel in 1888. Trephines are surgical instruments with a cylindrical blade. This form of trephine was used in the application of corneal grafts. The blade is rotated by a clockwork motor mounted in the top. This enables it to cut into the cornea of the patient. Photographed at the Royal College of Ophthalmologists, London, UK.
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