Na legenda da ilustração acima: "The eye and its similarity to a camera." Retirada da mesma fonte da seguinte afirmação: «The human eye is one of the most important military instruments that the armed forces possess.» Escrito por Edwin G. Boring, in “The eye as a military instrument”, capítulo 2 de Psychology for the armed services, Washington, The Infantry Journal Press, 1945, pp. 23-50
Contraposição.
N.R. Hanson, no clássico Patterns of Discovery (1965): «Seeing is an experience. A retinal reaction is only a physical state — a photochemical excitation. Physiologists have not always appreciated the differences between experiences and physical states. People, not their eyes, see. Cameras, and eye-balls, are blind.»
