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Class 4 is the highest and most dangerous class of laser, including all lasers that exceed the Class 3B AEL. By definition, a class 4 laser can burn the skin, or cause devastating and permanent eye damage as a result of direct, diffuse or indirect beam viewing. These lasers may ignite combustible materials, and thus may represent a fire risk.
If aimed at a person's eyes, laser pointers can cause temporary visual disturbances or even severe damage to vision. There are reports in the medical literature documenting permanent injury to the macula and the subsequent permanent loss of vision after laser light from a laser pointer was shone at a human's eyes.
To give another example, of a more powerful laser—the type that might be used in an outdoor laser show: a 6-watt green (532 nm) laser with a 1.1 milliradian beam divergence is an eye hazard to about 1,600 feet (490 meters), can cause flash blindness to about 8,200 feet (1.5 mi/2.5 km), causes veiling glare to about 36,800 feet (7 mi; 11 km ...
At that strength, the laser can cause eye damage up to 52 feet, temporary flash blindness up to 260 feet, glare or disruption up to 1,200 feet and distraction up to 11,700 feet, according to data ...
Never ever position a laser pointer near someone’s line of sight. Both cats and people can have their vision damaged by even a laser toy in the literal blink of an eye.
The label "eye-safe" can be misleading, however, as it applies only to relatively low-power continuous wave beams; a high-power or Q-switched laser at these wavelengths can burn the cornea, causing severe eye damage, and even moderate-power lasers can injure the eye. Lasers can be a hazard to both civil and military aviation, due to the ...
Pilots are reporting a massive uptick in being hit by laser pointers from the ground since the drone panic took off earlier this month, according to new data from the Federal Aviation Administration.
They are intended not to cause long-term damage to eyes. The emitters are usually lasers, making what is termed a laser dazzler. Most of the contemporary systems can be carried by a person, and operate in either the red (a laser diode) or green (a diode-pumped solid-state laser, DPSS) areas of the electromagnetic spectrum.