I pericoli delle radiazioni UV ai tuoi occhi! raccomando

pubblicato da 2019-04-24 15:45:50 L'Elenco 0 osservazioni

The Dangers of UV Radiation to Your Eyes!

‘Eyes are the windows to your soul.' You must have heard this quote. Though every part of the human body plays a significant role in our life, perhaps the most important one is the eyes. It goes without saying how important they are to a person. Without them, your life will be dark, figuratively and literally. So it is necessary for you to make sure they are protected at all times. While eyes might be the windows to your soul, they are also windows to harmful ultraviolet (UV) radiation. A lot of people understand the relation between UV radiation and skin cancer, but they are not aware of the damage it can cause to the human eye.  


What is UV light?

The sun is a great source of light for life on earth. Just like every coin has another side, the sun has sides too. The major danger of the sun rays comes in the form of UV radiation. A mixture of solar radiation is called UV radiation. Though sun exists naturally, some man-made things can also emit UV radiation such as welding machines, tanning beds, and lasers.


Types of UV radiation:

There are three different types of UV radiation. It should be noted here that apart from UV-C rays, both the UV-A and UV-B rays can cause short term or long term effects. It depends on the amount of time one may be exposed to them.

UV-A: It can hurt your central vision. It can damage a part of the retina that is at the back of a human eye. That part is called the Macula.

UV-B: Though the lens and the cornea absorb most of the UV-B rays, some of them might reach the eye, and it can cause more damage to the eye than the UV-A rays.

UV-C: The ozone layer absorbs it, so it doesn't post any threat to the eyes.


How does UV light impact our vision?

As we have already established that both long-term and short-term exposure to UV light can cause harm to eyes, there are several eye diseases that a person may catch after being exposed to them. They are:

  1. Macular Degeneration: You might have often heard about older people complaining that they are not able to see as well as they used to. Some doctors even suggest that as a person gets older, he loses his eyesight. It is because of Macular Degeneration or AMD, in short. It happens because the retina of the human eye is damaged. If you are exposed to UV light, the chances are that you might suffer from this disease long before it is supposed to happen.


  1. Cataracts: The camera lens was created after being inspired by the human eye. The lens in the human eye is responsible for focusing on the light that we are seeing. When the lens gets clouded, it is called cataract. UV-B rays are mainly known to increase the risk of some types of cataracts. It is even estimated that of all the cases of cataracts that happen, 10% of them are caused by exposure to UV lights.



  1. Pterygium:  Pterygium is a pink, non-cancerous growth that grows on the layer of conjunctiva on the white part of your eye. It may also involve cornea. After developing, when it reaches a certain size, it can block the vision. UV light of the sun is often a significant contributor to the formation of this growth.


  1. Skin Cancer: This is one of the most common and widely known problems that exposure to UV light can cause. It can happen inside the eyelids, or around them.  



  1. Corneal Sunburn: Also called photokeratitis or snow blindness, it happens when a person is exposed to UV-B light. It happens when the duration of the exposure is short but very intense. If you are sitting at the beach for a very long time or you are skiing without wearing proper eye protection, snow blindness can happen and it can be excruciating and may even cause temporary loss of vision.  


Is there a way to protect your eyes from UV radiation?

First of all, you need to understand that though UV radiation might only come from the sun, they are also reflected from the ground, water, snow, sand and basically anything bright. The best way to make sure you are protected is to use the right sunglasses. While selecting sunglasses look for the following qualities:

  1. They should block out 99-100 percent of both the radiation, UV-A, and UV-B.
  2. They should screen out 75-90 percent of the light that is visible.
  3. They should have grey-colored lenses so that the colors can be properly recognized.

If you spend a lot of time outdoors or in the sun, make sure your eyes are protected adequately. This applies to kids as well since they also spend a lot of time playing outdoors. Also, keep in mind to go to an eye doctor every two years to make sure there is nothing wrong with your eyes.

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