Sunlight Causes Cataracts
Exposure to sunlight may increase the risk of developing cataracts, scientists have found. A cataract is a cloudy or opaque area in the normally transparent lens of the eye.As the opacity thickens, it prevents light rays from passing through the lens and focusing on the retina, //the light sensitive tissue lining the back of the eye. It is the leading cause of blindness world-wide.
Researchers found people who were exposed to high levels of sunlight, or solar radiation, were up to four times more likely to develop cataracts. The researchers, led by Dr Cecile Delcourt, from the Institut National de la Sante et de la Recherche Medicale (INSERM), said: "It seems that sunlight exposure throughout a lifetime may be important to cataract formation."
The greater the dose of solar radiation, the higher the chance of developing a cataract. Mr Jonathan Dowler, a consultant ophthalmic surgeon at Moorfields Eye Hospital, said previous research had also linked cataract formation to light exposure
Thanks to bio-medicine.org
A new study tell us that lack of sunlight causes skin cancer, which is exactly the opposite of what the used to tell us. However, after further examination of the study it tells us that the people did not take vitamins while avoiding sunlight.
Read the next article below:
The sun's rays, which are called ultraviolet A and ultraviolet B rays (UVA and UVB rays) damage your skin. This leads to early wrinkles, skin cancer and other skin problems.
Being in the sun often over time, even if you don't burn, can lead to skin cancer. A tan is the body's desperate attempt to protect itself from the sun's harmful rays.
Tanning booths use ultraviolet rays. Makers of the booths may claim that they use "harmless" UVA rays. But both UVA and UVB rays cause skin damage. While UVA rays take longer than UVB rays to damage the skin, they go deeper into the skin than UVB rays.
Most skin cancers occur on parts of the body that are repeatedly exposed to the sun. These areas include the head, neck, face, tips of the ears, hands, forearms, shoulders, back, chests of men, and the back and lower legs of women.
A number of things may put you at higher risk of having skin cancer some day:
Having fair skin, red or blond hair
Having light-colored eyes
Sunburning easily
Having many moles, freckles or birthmarks
Working or playing outside
Being in the sun a lot as a child
Having had a serious sunburn
Having family members with skin cancer
Tanning in the sun or with a sunlamp
A normal mole is solid tan, brown, dark brown or flesh colored. Its edges are well-defined. It's usually smaller than 1/4 inch in diameter and has a round or oval shape. It should be flat or dome-like. The main thing to look for is any change in a mole that you have or the appearance of a new mole. Most normal moles appear by age 30. Any moles that appear after age 30 should be watched carefully and brought to the attention of your family doctor.
Signs of skin cancer ABCDE rule
A for asymmetry: A mole that, when divided in half, doesn't look the same on both sides
B for border: A mole with edges that are blurry or jagged
C for color: Changes in the color of a mole, including darkening, spread of color, loss of color, or the appearance of multiple colors such as blue, red, white, pink, purple or gray
D for diameter: A mole larger than 1/4 inch in diameter
E for elevation: A mole that is raised above the skin and has an uneven surface
Other signs include
A mole that bleeds
A fast-growing mole
A scaly or crusted growth on the skin
A sore that won't heal
A mole that itches
The key is to avoid being in the sun or using sunlamps. If you're going to be in the sun for any length of time, wear clothes made from tight-woven cloth so the sun's rays can't get through to your skin, and stay in the shade when you can. Wear a wide-brimmed hat to protect your face, neck and ears.Remember that clouds and water won't protect you--60% to 80% of the sun's rays can get through clouds and can reach swimmers at least one foot below the surface of the water. The sun's rays can also reflect off of water, snow and white sand.
Tips on Preventeing Skin Cancer
Avoid the sun, especially from 11 a.m. to 3 p.m., when the sun's rays are the strongest.
Don't use tanning booths or sunlamps.
Wear protective clothing and hats.
Check your skin yourself every month for signs of skin cancer.
If you see an area on your skin that looks unusual, ask your family doctor about it.
If you can't protect yourself by staying out of the sun or wearing the right kind of clothing, use sunscreen to help protect you. But don't think that you're completely safe from the sun just because you're wearing sunscreen.
Use sunscreens with a sun protection factor (SPF) of 15 or more. Put the sunscreen everywhere the sun's rays might touch you, including your ears, the back of your neck and bald areas of your scalp. Put more on every hour if you're sweating or swimming
Go here for full article including how to check yourself for skin cancer: http://familydoctor.org/online/famdocen/home/common/cancer/risk/159.html
By avoiding sunlight and taking the following vitamins and minerals, you will lower your risk of skin cancer considerably.
Vitamin C
Vitamin E
Vitamin A
Vitamin B Complex
Vitamin K
Minerals for Skin
Selenium
Copper
Zinc
Dangers of Heat
Prolonged exposure to high temperatures can lead to heat exhaustion and eventually to heatstroke. Vulnerable people can begin to suffer problems when the temperature rises into the thirties. By the time the thermometer tops 113F (45C), everybody is potentially at risk.
Heat exhaustion refers to overheating of the body due to excessive loss of water or, in rare cases, salt depletion. People who suffer from heat exhaustion have often been taking part in strenuous physical exercise.//
Symptoms include thirst, headache, pallor, dizziness and possibly nausea or vomiting. In severe cases, the heart rate increases and the sufferer may feel disoriented. heatstroke or sunstroke occurs when the body's thermoregulatory system stops working and body temperature rises to approximately 107F (42C.)
Dr Ron Behrens, of the Hospital for Tropical Diseases in London, told BBC News Online that the elderly and the very young were particularly vulnerable to the effect of high temperatures. He said obese people, and those with medical conditions such as heart disease and diabetes were also potentially at risk.
He said: "In a heatwave the body has to spend much of its energy trying to keep the core temperature down and this increases the stress on everything else." However, he said anybody could be at risk if they did not take sensible steps.
There are a number of sensible things that everybody should do to avoid illness when temperatures soar. Increase your intake of non-alcoholic, non-carbonated, caffeine free beverages such as water and fruit juice,wear clothing that is light in colour and loose fitting ,avoid the outdoors during extreme heat,stay out of the sun,eliminate strenuous activity. Some experts also believe it is a good idea to cut down on the amount of proteins that you eat during a heatwave, as they can increase metabolic activity and generate heat in the body.
Thanks again to bio-medicine.org
Sunlight poses many more threats that would take far too long to include in one post, but as you can see, sunlight is a very dangerous thing that should be avoided at all costs.
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