How LED Flashlights Affect Night Vision

  Although science and technology in the development,there are so many people to use led flashlight when they are outdoors in the dark.But you have thought about it?How LED Flashlights Affect Night Vision?

  To dive a bit deeper into the biology of vision, consider this: A special biological pigment called rhodopsin aids the eye’s rods in delivering nighttime sight. Rhodopsin molecules actually change shape as light hits them. Extremely bright light shocks rhodopsin molecules into very different shapes. It can take as long as half an hour for the body to return its rhodopsin stores back into the shape that works best for night vision.

  For this reason, avid hunters and fishermen hate it when a newbie blasts his or her LED flashlight without warning. Even a moment of LED light can destroy your night vision temporarily.

  You may have noticed outdoorsmen favoring red-tinted LED flashlights in night expeditions. There’s a good biological reason for this, as well. Namely, your eye’s rods can’t detect red light. Its cones, however, can. Using an LED flashlight or headlamp on the red setting helps preserve night vision by taking advantage of your cones’ ability to see color. At the same time, red light doesn’t trip the eye’s rods, thus protecting your rhodopsin molecules and preserving natural night vision.

  So now you know How LED Flashlights Affect Night Vision,you should learn to how to protect your eyes.