Is infrared light harmful to the eyes?

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.

The effect of infrared rays on the eyes Because the eyeball contains more fluid, it absorbs infrared rays strongly, so a certain intensity of infrared rays can cause cataracts when they directly irradiate 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.

When exposed to ultraviolet light, the degree of injury to the eye is proportional to the time, inversely proportional to the square of the distance from the source, and related to the angle at which the light is projected.

When ultraviolet rays act strongly, photodermatitis can occur, and erythema, itching, blisters, edema, eye pain, tearing, etc. appear on **; In severe cases, it can also cause ** cancer.

Ultraviolet rays act on the central nervous system, causing headaches, dizziness, and increased body temperature. Acting on the eye, it can cause conjunctivitis, keratitis, called photoophthalmia, and may also induce cataracts, and the ultraviolet rays produced during the welding process can cause welders to suffer from electro-optic ophthalmia (can**).

Are infrared rays harmful to people? This is a very common question. Before we get there, we need to know some basics.

Infrared is an electromagnetic wave with a wavelength range of microns. Infrared rays in this range are divided into three categories: near-infrared, mid-infrared, and far-infrared. Among them, the near-infrared wavelength is the shortest, and the far-infrared wavelength is the longest.

Are these infrared rays harmful to the human body? In fact, infrared radiation is also emitted from inside our bodies. As for the infrared radiation received from the outside world, as long as the energy received does not exceed the limit that the body can bear, it will not cause direct harm to the human body.

Therefore, low-intensity infrared rays generated by ordinary electrical appliances and heaters that are exposed to in daily life do not cause obvious health hazards.

In some specific cases, high-intensity infrared rays can be harmful to the human body. For example, if you work in a hot environment or are exposed to direct sunlight for a long time, you may be "burned", causing rashes, blisters, and other reactions. The eyes can also be damaged, causing symptoms such as redness, swelling, pain, etc.

How can we prevent these hazards? Minimize the time spent working in a high-temperature environment. If you must work in a hot environment, be sure to wear appropriate protective gear.

Pay attention to sun protection when exposed to the sun for long periods of time, and you can choose protective measures such as wearing sunglasses. It is also important to be safe when using electrical appliances at home, choose products with reliable brands, and follow the correct way to use them.

Low-intensity infrared rays exposed to in daily life do not cause significant harm to the human body. However, in some specific cases, high-intensity infrared rays may be harmful to the human body. Therefore, it is necessary to pay attention to safety and take corresponding protective measures when using electrical appliances and working in a high-temperature environment.

Infrared rays do not directly harm the human body, but if you come into contact with the infrared rays emitted by high-temperature objects for a long time, it will cause burns and sunburns. If exposed to strong sunlight for too long, it can also cause damage to **.

In addition to the effects on **, prolonged exposure to infrared light emitted by hot objects can also lead to dehydration and heat stroke. Excessive loss of water in the human body can cause discomfort such as lower blood pressure and rapid heartbeat, and even endanger life and health.

High-energy infrared radiation sources used in some industrial sites or laboratories can cause eye damage. If you look at these radiation sources for long periods of time without protection, it can lead to blurred vision, eye strain, and even blindness.

Although infrared rays cannot directly cause harm to the human body, we still need to pay attention to avoid prolonged exposure to infrared rays emitted by hot objects, and take protective measures if necessary to protect our health.