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Laser wavelength and eye damage

by:LASERRPAIR     2020-06-04
??????Of the laser injuries, the most serious is the eye injury in the body. Lasers with wavelengths in visible light and near-infrared light have a low absorption rate and high transmittance of the refractive medium of the eye, and the focusing ability (ie, light-gathering power) of the refractive medium is strong. When high-intensity visible or near-infrared light enters the eye, it can pass through the refractive medium of the human eye and accumulate light on the retina. At this time, the laser energy density and power density on the retina are increased to thousands or even tens of thousands of times. And lose the role of light. The coagulation and denaturation of proteins caused by overheating when the laser converges on the photoreceptor cells is irreversible damage. Once damaged, it can cause permanent blindness of the eyes. The effect of different laser wavelengths on the eyeball is different, and the consequences are also different. The damage of the far infrared laser to the eye is mainly cornea. This is because the laser of this wavelength is almost completely absorbed by the cornea, so the corneal damage is the most serious, mainly causing keratitis and conjunctivitis. Fear of light, tearing, hyperemia of eyes, decreased vision, etc. In case of far-infrared light damage, the injured eye should be covered and protected to prevent infection and symptomatic treatment. The damage to the eye caused by the ultraviolet laser is mainly the cornea and the lens. The ultraviolet laser in this band is almost completely absorbed by the lens of the eye, while COSCO mainly absorbs the cornea, which may cause the lens and cornea to be cloudy.
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