Helmholtz's ophthalmoscope
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Helmholtz's ophthalmoscope. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Helmholtz's ophthalmoscope. Wellcome Collection. Source: Wellcome Collection.