Example of two glass eyes, white glass, with blood vessels in red, and vari-coloured lenses, from a small case. Made by W. Halford of London.

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: Example of two glass eyes, white glass, with blood vessels in red, and vari-coloured lenses, from a small case. Made by W. Halford of London. Wellcome Collection. Source: Wellcome Collection.