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understanding-the-eye-via-laser-safety
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  3. Understanding the Eye via Laser safety

  • Understanding the Eye via Laser safety


    The eye is a body system organ, tremendously sensitive to laser injury. This fact, is because the eye is a light receptor in addition to the fact that lasers deliver light of great brightness. Exposure of the eye to laser light will surely lead to serious and lasting injury. Before heading to eye-damage mechanisms, let’s understand the structure of the eye.



    The cornea is the clear surface of tissue coating the eye. Damage to the external cornea might produce a strange feeling of discomfort (similar to a gritty sensation) or might be just disturbing, and will eventually normally get well quickly. Injuries in further levels of the cornea lead to long lasting injury. 

    The lens centers light to develop images onto the retina. With time, the lens evolves into considerably less pliable, thereby making it challenging to focus on close images. With growing older, the lens usually will become cloudy and ultimately opacities, known as cataract. Each and every lens proceeds cataract sooner or later.

    The fovea Centralis (known as the Macula Lutea) – is the area of the eye that delivers the best crucial vision is. Basically a rather small part of the retina (three to 4%) creates the more detailed, critical image in addition to color perception, image. Because of this eyes travel at the time you read or perhaps at any time you look at things; the image need to be focused on the fovea for specific observation. The retina senses light and also movement, but not detailed images (peripheral vision).
    In case a laser burn happens on the fovea, nearly all fine (reading and also working) eyesight could be lost immediately. In case a laser burn takes place in the peripheral eyesight perhaps it will create little if any effect on fine vision. Frequent retinal burns could lead to blindness.
    Likely the eye has a self-defense mechanism using the blink or aversion response. When a bright light hits the eye, the eye tends to blink or turn away from the light source (aversion) within a quarter of a second. This may defend the eye from damage where lower power lasers are involved, but cannot help where higher power lasers are concerned. With high power lasers, the damage can occur in less time than a quarter of a second. In these cases laser safety glasses are essential!
 
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