World War One: men with wounds to the eyes walking in a single line, each man placing his left hand on the left shoulder of the man in front for assistance. Captioned 'Nightfall.'

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: World War One: men with wounds to the eyes walking in a single line, each man placing his left hand on the left shoulder of the man in front for assistance. Captioned 'Nightfall.'. Wellcome Collection. Source: Wellcome Collection.