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.

Read more about Night Vision:  Biological Night Vision, Night Vision Technologies, Night Vision Goggles, Active Infrared, Laser Range Gated Imaging, Thermal Vision, Image Intensifier, Night Vision Devices, Automotive Night Vision

Famous quotes containing the words night and/or vision:

    Undershaft: Alcohol is a very necessary article. It heals the sick—Barbara: It does nothing of the sort. Undershaft: Well, it assists the doctor: that is perhaps a less questionable way of putting it. It makes life bearable to millions of people who could not endure their existence if they were quite sober. It enables Parliament to do things at eleven at night that no sane person would do at eleven in the morning.
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