Talha M Sarwar, Feature- English BS 152

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Roll No 152

PROLONG SUN EXPOSURE CAN CAUSE UNEXPECTED CONCERNS.

Do you know that you still expose to UV rays from sun,even if you are indoor?

Our Earth is nothing without sun. If sun did not exist, our planet would be an ice ball and lifeless, hence sun serves major role in our daily life. Sun has so many essential benefits,such as keeping seas warm, stirring atmosphere, generating the weather cycle, and giving energy to green plants, which can not be denied. Although sun provide unlimited benefits to living organisms,sun can also cause other concerns,which could be threatening for living organisms.

Sun is abandoned of ultraviolet radiations (UVR), which are named ultraviolet A (UVA), ultraviolet B (UVB) and ultraviolet C (UVC). UVC is not as strong as UVA and UVB, therefore UVC does not reach on the surface of the Earth,while UVA and UVB reach on the surface of the Earth and the fact is UVA rays can enter through the windows of house, but under shelter UV rays do not cause any serious concern. UV rays are stronger between 10 am to 4pm and these peak hours should be avoided during strong index of UV rays, while the strength of UV rays depends on a number of factors,such as season of the year, distance from the equator, altitude, clouds, reflection of surfaces and content of the air.

We expose to sun light on daily basis, whether it could be long term or short term, varies person to person.However sun is the greatest source of vitamin D, excessive sun exposure is not necessarily important for vitamin D synthesis, because prolong sun exposure could raise more concerns than just vitamin D synthesis, sun does not provide humans vitamin D, rather human body is designed to make vitamin D synthesis, when the skin is exposed to sun light.Even then someone really wants to increase vitamin D from sun, morning sun light before 10 pm is considered to be safe for getting vitamin D. While sun is not only source of Vitamin D, but vegetables and fruits also provide human significant vitamin D and these sources are well studied for vitamin D.

People go out and let their skin expose to sun either for work or for tanning purpose, but the fact is, it not only speeds up ageing process, but it also increases the chances of skin cancer for those, who do not have enough melanins in their skin to protect against UV rays, because these melanin pigments work as an umbrella to prevent cancer in the skin and these melanins also give tanned colour to skin, while these melanins in the skin will not slow down ageing process.

UV rays penetrate into skin deeply and damage the fibres called elastin in the skin, these fibres are meant to maintain firmness and youth in the skin. When UV light penetrates deeply in the skin, it damages the fibre in skin and leads pre mature ageing. Sun exposure can also cause sun spots or age spots on the skin due to over production of melanins, so while the damage may not be visible in youth, but these age spots will become visible and stubborn later in life.

Skin cancer is one of the prior concern of prolong sun exposure in human,although high chances of skin cancer happen in US, since lack of melanins is the cause of cancer, sun can also cause skin cancer in other parts of the world. UV light causes basal cell and squamous cell skin cancer and it can also be severe blisters and sunburn, but these disease convert into melanoma later in life. Cumulative sun exposure can lead to eye cancer, when uv rays affect the skin around eyes, cause cataracts, cancer of the eyelid and it may cause macular degeneration.

Staying in sun for long time can cause dehydration. Dehydration happens when the body is exposed to sun and the body sweats to cool itself off, due to this reaction the hydration level of a body decreases and sun is the only thing,which can be blamed for dehydration. It usually happens during hot summer season, however dehydration can happen any seasons of the year.

When there is a sign of heat stroke, it means emergency, because heat stroke can terminate life in no time. Sun can cause heat stroke when body gets over heated during hot weather.Dehydration can also cause heat stroke, however heat stroke does not happen while staying indoor.

Taking care of the skin out door is crucial to protect the skin from UV rays, so these concerns will not occur. Using a good SPF 30+ reduces the risk of skin cancer and pre mature ageing, wearing SPF indoor is also important,as UVA can enter through windows. Drinking plenty of water can prevent heatstroke and dehydration and avoid direct sun light too. Remember prevention is always better than cure.