Is infrared light harmful to the eyes, and is infrared light harmful to the human body

Staring at infrared lights can harden the lens of the eye, especially in small children.

The effect of infrared light on the eye.

Because the eyeball contains a lot of fluid, it absorbs infrared rays strongly, so a certain intensity of infrared rays can cause cataracts when directly irradiating the eyes. The production of cataracts is related to the action of short-wave infrared rays; Infrared rays, which have wavelengths larger than microns, do not cause cataracts.

1.Cataracts caused by short-wave infrared rays.

Infrared rays are easy to penetrate into the transparent medium and reach the eye, the refractive interstitium is vascular, the heat dissipation performance is poor, and the adjacent uvea can absorb a large amount of radiation, so it is susceptible to damage and form cataracts. If infrared rays are concentrated in the macula, macular damage can occur.

2.Solar retinal choroidal burns.

It is mainly caused by the heat energy generated by short infrared rays and visible light through the refractive interstitial zigzag aggregation points, which is mostly caused by naked-eye observation of solar eclipses. It is more common in young people and emmetropia.

Clinical presentation. 1.Cataracts caused by short-wave infrared rays.

Typical changes of infrared cataract usually start from the posterior pole, and the cortex is initially a small ink-stained wheel-like or disc-shaped turbidity, or it can be spider-web-like turbidity, with bright crystals in the center, and has the characteristics of thin turbidity and clear boundaries. The superficial layers of the anterior capsule can peel off, curl freely, and flutter freely in the anterior chamber.

2.Solar retinal choroidal burns.

The main symptom is initially flare, followed by photophobia, photohallucinations, and abnormal color vision. After 24 hours, the fluttering dark shadow becomes a dense dark spot, which can be a temporary or permanent central dark spot. Visual acuity decreases to the level below, and there is distortion of vision.

Fundus examination: the lesion is limited to the macular area, and the macula is darkened in mild cases; In severe cases, the edema is raised, gray, and there are small bleeding spots; Typically, there are yellow and white spots in the center of the macula, and perforations and retinal detachment can be formed around the pigmented spots in severe cases.

Examine. 1.Check for a history of radiation exposure and radiation-induced injuries.

2.Visual field, fundus fluorescence contrast and other examinations.

**。1.Cataracts caused by short-wave infrared rays.

For patients with early infrared cataracts, they should be separated from the infrared radiation environment, and cataract extraction can be performed if the lens is completely clouded and the retina is functioning normally.

2.Solar retinal choroidal burns.

Corticosteroids, B vitamins, and vasodilators may be taken after an injury. Mydriatic eye drops and retrobulbar hormone injections can also be used.

Prophylaxis. Wear appropriate eye protection. The lens contains ferrous oxide and GRB colorless lenses, and the absorption rate of the infrared spectrum is more than 90%. Do not look directly at the sun.

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Yes. In the spectrum, the wavelength from 400 microns is called infrared light, and the wavelength range is divided from infrared rays through the atmosphere, and the micron wavelength band is called near-infrared light; The 3-5 micron band is called mid-infrared, and the 5-1000 micron band is called far-infrared.

Infrared is a kind of electromagnetic wave, which can penetrate deep into the subcutaneous tissue in all sunlight, promote blood circulation, keep the body at a certain temperature, and be absorbed by the human body in an orderly manner. The damage effect of infrared rays on ** is mainly caused by the reaction of infrared irradiation is caused by molecular vibration and temperature increase, and the penetration of thermal radiation caused by infrared rays exceeds that of ultraviolet rays.

<>Usually it's harmless. Infrared lamps can also have a positive effect on many physical diseases in the human body. However, radiation still exists, and if the exposure time is too long, it may cause some of the above diseases, such as allergic rashes, accelerated aging or other adverse reactions.

Infrared lamp has the effect of blood circulation and analgesia, inflammation and sterilization. Post-operative wound recovery, local aseptic inflammation or soft tissue contusion can be achieved with infrared light**. Chain transport cover