from Treatment
Published online by Cambridge University Press: 13 December 2022
Ancient medical practitioners believed in the “doctrine of signatures,” which stated that natural objects that resembled parts of the body could cure diseases affecting those parts. The eyebright plant was used to cure eye diseases due to the similitude of its flowers to blue eyes. The famous Swiss physician Paracelsus was a proponent of this doctrine and stated, “Nature marks each growth, according to its curative benefit.” Herbs were believed to have particular “signatures” given by God for people to identify and use. Although this doctrine had no scientific basis, it led to the discovery of a drug widely used today [1].
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