Night vision

Two American soldiers pictured during the 2003 Iraq War seen through an image intensifier

Normalised absorption spectra of the three human photopsins and of human rhodopsin (dashed).

1974 US Army film about the development of military night vision technology

Night vision is the ability to see in low light conditions. Whether by biological or technological means, night vision is made possible by a combination of two approaches: sufficient spectral range, and sufficient intensity range. Humans have poor night vision compared to many animals, in part because the human eye lacks a tapetum lucidum.

单词	Rod vision
释义	Rod vision 英语百科 Night vision Night vision is the ability to see in low light conditions. Whether by biological or technological means, night vision is made possible by a combination of two approaches: sufficient spectral range, and sufficient intensity range. Humans have poor night vision compared to many animals, in part because the human eye lacks a tapetum lucidum.
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Rod vision

Night vision