Air Ministry Pamphlet 158. P/b, 14 x 21cm, 1st edition, June 1943, 17p. Provides information, hints and tips on vision in flight. Illustrated with drawings and photographs. Covers general information on the eyes and vision and has tips on dark adaption, maintaing dark adaption, the importance of clean perspex, warmth etc. The cover is lightly soiled and creased. One inner page corner absent, others dog-eared, central page loose but generally quite good. An interesting booklet. Stock code P21087.