Night Vision

Even in the dark, most of us still can see. Well, we can see to a point. The animals, moreover, are able to see more details in low-light or no light situations than us, and then explains some of the factors, both biological and environmental, that make this possible.

Human magnified view
We have two ranges to be incorporated to enhance our night vision are known as spectrum and infrared spectrum. When we use our spectral range allows us to take advantage of what is normally invisible to the naked eye. We can see in the infrared and ultraviolet spectrum, with the help of products such as night vision goggles and binoculars. Special infrared optical digital camera also allows us to see in the infrared spectrum and can be used in images thermal well.

Human Biological Vision
As human beings we have three types of vision, of course, the use, in order to be able to see in any lighting situation, known as photopic, both mesopic and scotopic. We see a range of several million to one and a vision we see the highest photopic light levels and this is what we use in the daytime. Scotopic works in low light situations, while our vision both mesopic is what we use in low light, when no detail can be seen. When the human eye moves from bright to dark or dark to light that can take up forty-five minutes for the eye to adjust properly, but animal that happens immediately.

Tapetum lucidum
A number of vertebrate animals are based on a layer of tissue called tapetum lucidum behind or in their retinas. There are four types of tapetum lucidum found in the variety of animals on the planet. This masterpiece of nature that allows the light is refracted back into the retina, allowing the animals to have a magnified view that allows them to see in the dark. This happens instantly for them. The eyeshine you see in animals like cats, dogs, deer, when the light reaches your eyes in the darkness is the result of the tapetum lucidum. The eyeshine can occur in different colors like red, green or blue, depending on the animal.

Animal Biological Vision
Here are some examples of how different animals can see in the dark.

Pit vipers, and many other snakes, find their prey at night by the smell and taste the air and the use of deep wells in the side of the head to help them detect heat as a form of thermal vision.

Fruit Bats are folded retina using in conjunction with sonar which allows them to navigate and find food in the dark.

Owls have the ability to see small animals in the distance of a football field away. They have special lenses that can extend the information just as a telescope does not.

Rays and sharks have flat refractive crystals of guanine, which activate in the murky waters to allow a better view.

So as to the naked eye regards it's pretty obvious that many, if not all animals have a definite advantage over us humans when it comes to see in the dark. But as luck would have it, we humans have been able to develop night vision technology to the point where we can see very clearly in near darkness. But if you think your eye can now compete with an animal I'm afraid you are sadly mistaken.

Night vision technology has advanced so much in the past few years that it is being used in everyday life. Night goggles are frequently used for surveillance by security companies and outdoors men have incorporated the technology into their hunting scopes which enables them to hunt at night when most wild life are active.

Anti-Nightvision camouflage

Night Vision

Night Vision