How does laser affect the human body?

How does laser affect the human body?

In recent years, my country's laser industry has developed rapidly, and the application market has gradually expanded, breaking through many problems, unlocking a number of core technologies, and gradually getting rid of the predicament of being "stuck in the neck" by foreign countries. With the vigorous development of the laser industry, more and more people have begun to pay attention to the research and development, production and application of lasers. Among them, "what effect will the laser have on the human body?" has become a question that everyone is very concerned about. We will answer this question for you.

The effects of laser on the human body mainly include damage to the eyes and damage to the skin.

damage to human skin

Due to its physiological structure, human skin can form a complete protective layer, which will protect the human body to a certain extent in daily life. When the laser with excessive power is irradiated to the skin, it will cause damage to the skin tissue. Although this damage can be repaired by the skin tissue itself, the protective function of the repaired skin tissue will be reduced.

The degree of laser damage to the skin is mainly affected by factors such as the amount of laser irradiation, the wavelength of the laser, the depth of the skin tone and tissue moisture. A large number of experiments have proved that when the laser irradiates the skin, the power density of the laser is positively correlated with the degree of skin tissue damage. There is a certain safety threshold for the absorption of laser energy by human skin. When the safety threshold is exceeded, human skin (the part irradiated by the laser) will appear erythema, blisters, carbonization, boiling, burning and even vaporization due to the increase in the amount of laser irradiation. . From this, it is not difficult to know that the damage of laser to human skin is mainly due to the thermal effect of laser.

Although the damage to human skin caused by laser irradiation is not enough to affect the overall functional structure of skin tissue, it is still necessary to strengthen the protection of human skin during daily teaching and use, wear protective clothing as required, and minimize the impact of laser on human skin. damage.

damage to eyes

When the laser damages the human body, the damage to the eyes is the most serious.

The human eye is an approximate spherical body composed of the eyeball wall, the contents of the eyeball, and the retina. The eyeball wall is composed of three layers of membranes with different textures: cornea and sclera, iris and choroid, and retina. The ocular contents include the lens, aqueous humor, and vitreous.

The refractive system of the eyeball is composed of the cornea and the contents of the eye. Because of its transparent nature, light will not be blocked when passing through. The cornea, iris, lens, vitreous and aqueous humor together form the precise optical system for the human body to receive light.

The refractive system has the characteristics of low absorption rate, high transmittance and strong focusing ability, which allows the laser to pass through the refractive system and reach the retina when it enters the eye. At this time, the laser energy density on the retina can be increased by thousands or even tens of thousands of times. Excessive retinal temperature leads to necrosis of photoreceptor cells, resulting in irreversible damage and even permanent blindness.

The damage of far-infrared laser to the eye is mainly aimed at the cornea, while the ultraviolet laser is mainly absorbed by the crystal. After the cornea is damaged, it will cause keratitis and conjunctivitis, and the injured will also have symptoms such as fear of light, tearing, decreased vision, and congestion. When the crystal is damaged, the phenomenon of crystal turbidity occurs.

Since the damage to the eyeball caused by laser irradiation is irreversible, it is necessary to pay great attention to the protection of the eyes when using it, wear goggles, keep a certain safe distance, and strictly abide by the relevant rules and regulations to fundamentally avoid the occurrence of injury.

At present, most of the laser injury cases in my country are accidental irradiation accidents, and a few are complications caused by laser treatment. When the human body is injured by the laser, it is necessary to take sufficient rest and protect it from light. If the trauma is serious, professional medical staff should be contacted immediately, and if necessary, glucocorticoid therapy can be used, supplemented by traditional Chinese medicine therapy for promoting blood circulation and removing blood stasis.

Before using the laser for operation, check whether there is light leakage, and seal the position where there may be light leakage; the working environment should maintain sufficient lighting, and a protective structure made of light-absorbing material should be used around it; individuals should check first when working with lasers Goggles and protective uniform are in good condition.

All in all, laser will cause serious harm to the human body, but to a large extent we can avoid it through scientific and standardized means.