British Army standard issue spectacles

Most soldiers wore their own civilian spectacles. However, the British Army designed a pair of standard pattern spectacles. They could be worn when using a gas mask. To ensure that they were being worn correctly, a medic could be consulted. 

Le Lance Corporal Walter Ray du Royal Engineers partage du rhum avec d’autres soldats, il porte des lunettes réglementaires de l’armée britannique IWM B5260