Fick’s ophthalmic tonometer, Germany, 1888-1936

1888-1936 in Wurzburg

Fick's ophthalmotonometer, by Siedentopf, Wurzburg, Germany

Tonometers measure pressure within the eye. This is known as intraocular pressure. Glaucoma is a condition where the optic nerve becomes damaged leading to loss of sight. Glaucoma raises intraocular pressure. Tonometers were refined in the 1880s by German physiologist Adolph Eugene Fick (1829-1901). Cocaine was introduced as a local anaesthetic in 1887. This allowed tonometers to be applied directly to the cornea.

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Object Number:
instrument, brass and instrument, steel
ophthalmic tonometer

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