This is the danger When Staring Direct Sunlight

When he was outdoors in the daytime should Buddies avoid staring at the sun directly, because there is some danger when we looked at the direct sunlight. To that protect and to care for your eyes while you are outdoors during the day, and this time will review this danger when staring direct sunlight so that Buddy can all be more vigilant.

Sunlight contains an infrared (IR) and ultraviolet (UV). Ultraviolet rays are invisible rays that are part of the energy derived from the sun. Ultraviolet rays distinguished into UVA, UVB and UVC. Here's a little information about each type of ultraviolet light:

1. UVA accounts for approximately 95% of UV radiation reaching the Earth's surface with an intensity of 30 to 50 times more powerful than UVB rays. UVA rays from the sun to appear there until sunset, while the UVB intensity reaches its peak only from 10:00 until 14:00.
2. UVA rays can penetrate clouds and glass, unlike UVB does not penetrate glass.
3. In a small intensity, UVB helpful in the process of synthesis of vitamin D in the body. However, excessive exposure to UVB rays can lead to eye disorders such as erythema and cataracts.
4. Exposure to UVB can make the skin reddening or burning, but only able to sign up to the epidermal layer of the skin (the outermost layer). While exposure to UVA rays can penetrate through to the dermis (the deeper layers) that can cause damage to the collagen, triggers premature aging and black stains. Radiation caused by exposure to UVA rays continuously can trigger carcinogenesis process (the formation of cancer cells) and immunosuppression (a weakened immune system of the skin).
5. UVC rays are the most dangerous and destructive has the highest level. Fortunately we were able to Earth's ozone layer absorbs UVC rays so it does not go into the earth's surface. Damage to the ozone layer caused by the release of certain chemicals (such as freon, fumes, etc.) feared a reduced ability to absorb UVC ozone layer which would adversely affect humans.

Then what is the danger in the eye when the eye is exposed to ultraviolet light exposure is directly and continuously?

This is the danger when looking at the sun directly:

1. Risk of damage to eyes

The intensity of UV rays on a large scale to penetrate the eye's retina can cause damage to the stem cells (rod cells) and cones (cone cells) in the eye. Sunlight, especially UV rays can trigger a series of chemical reactions in eye cells, which in turn risk damaging the ability of the cells of the eyes in response to visual objects. In continuous high intensity and can cause damage to the eyes, such as cataracts and even can cause temporary blindness to total blindness.

2. photokeratitis

Photokeratitis is a condition of severe eye damage caused by ultraviolet rays of the eyeball, either ultraviolet light alamai (sourced from the sun) or artificial. The symptoms caused may include pain, itching like there is sand in the eyes, sensitivity to light and shed tears. In some cases, symptoms may improve within a few days with a note during the recovery process of patients eyes are protected from exposure to direct sunlight. Complications such as a decrease in vision or eye infection is rare, but exposure to UV rays directly and continuously can increase the risk of complications.

3. Pterygium

Pterygium is growing conditions membranes (such as the new meat) that covers the white part of the eyeball. Pterygium rarely causes serious complications, but if left untreated can spread pterygium to penetrate into the cornea and lead to decreased vision capabilities. Medical causes of pterygium condition is not known for certain, but the results showed those who work outdoors are exposed to direct sunlight can increase the risk of pterygium.

4. Eye Cancer squamous

Danger when looked at next direct sunlight that is an increased risk of squamous cancer of the eye. Sun exposure with high intensity can cause disease are at risk of squamous cancer of the eye. In addition to sun exposure, squamous cell eye cancer can also be caused by genetic or hereditary factors, lack of pigment elements on the lid margin, and also people with HIV susceptible to eye cancer.

5. Macular Degeneration

The macula is the center of the retina and the most vital part of the retina, allowing the retina seeing fine details in an object view. Macular degeneration is a condition in which the macula setback that caused a decrease in visual acuity, which can potentially cause loss of central vision. Macular degeneration usually associated with age, which is often experienced by someone who has aged over 65 years, but exposure to direct sunlight continuously to accelerate the process of macular degeneration. In addition, the results showed smoke also can increase the risk of macular degeneration.

That is the danger in the eye when he looked at direct sunlight. After knowing its adverse effects, it is very wise if we perform preventive measures to avoid the risk of health problems arising from exposure to the sun. Here are tips to protect the eyes from the sun:

1. Use sunglasses with UV filter. Sunglasses or sunglasses actually used not just for fashion purposes, but serves to absorb UV radiation. Sunglasses plain not able to absorb UV radiation well, so make sure sunglasses are Buddy wear have UV filters of good quality in order to protect the eyes from sun exposure which can be detrimental. It would be better if the dude wearing sunglasses comes with polarized, which serves to reduce glare and improve comfort, especially when driving.
2. In addition to sunglasses, Buddy can supplement or replace the self-protection by wearing a hat or using an umbrella to avoid exposure to direct sunlight.