Infrared ray is a kind of thermal radiation, which will cause high temperature damage to human body. Strong infrared rays can cause skin damage, similar to scalding, burning pain first, then burning.

In several different situations, infrared rays can hurt the eyes. The infrared ray with the wavelength of 7500 ~ 13000 A has a high transmittance to the cornea, which can cause damage to the fundus retina. Especially 1 1000 angstrom infrared rays can protect the anterior media of the eyes from damage and directly cause retinal burns.

Almost all infrared rays with the wavelength above 19000 A are absorbed by the cornea, which will cause corneal burns (opacity and white spots). Most of the energy of infrared ray with wavelength greater than 14000 angstrom is absorbed by cornea and intraocular fluid, but it cannot penetrate iris.

Only infrared rays below 13000 angstrom can penetrate the iris, causing iris damage. Long-term exposure of human eyes to infrared rays may cause cataracts. When infrared rays act on human epidermis, part of them will be reflected and only part will be absorbed by the skin.

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Application of infrared ray:

1, the effect of infrared rays on blood

Because infrared rays can penetrate deep into the subcutaneous tissue of human body, using infrared ray reaction can increase the temperature of deep subcutaneous skin, dilate microvessels, promote blood circulation, revive enzymes, and strengthen the metabolism of blood and cell tissue, which is of great help to cell rejuvenation and can improve anemia.

Regulating blood pressure: Hypertension and arteriosclerosis are generally caused by contraction and stenosis of arterioles such as nervous system, endocrine system and kidney. Far infrared rays dilate capillaries, promote blood circulation, reduce hypertension and improve hypotension symptoms.

2, the role of infrared rays on joints

The deep penetration of infrared rays can reach the depths of muscle joints, which can warm the body, relax muscles, drive the exchange of oxygen and nutrients in the microvascular network, and eliminate aging wastes such as fatigue substances and lactic acid accumulated in the body, which has excellent effects on eliminating swelling and relieving soreness.

Baidu Encyclopedia-Infrared