Sunlight is
useful for our healthy living however over exposure to sun rays can affect our
skin and even cause skin cancer. Wearing sun block is very important since
early age. Wrinkles, skin aging, and in some cases, a leathery feel to your skin
may be some of the results that you are seeing as a consequence of overexposure
of the sun to your skin. Sun protection is a lifelong process that begins at
infancy and should be continued throughout life.
Why sun ray is dangerous: Sunlight
consists of three types of rays - UVA, UVB and UVC, out of which the UVC rays
are the most powerful and damaging.
Natural sunlight contains, among other
things, ultraviolet (UV) photons.
The UV rays that we are exposed to here on
the earth's surface consist of UVB and UVA photons and cause intrinsic damage
within the skin cells.
The shorter wavelength UVB rays don't penetrate deeply
into skin; they cause significant damage to DNA and are the primary cause of
sunburn and skin cancer.
Visible signs of sun damage include tanning,
development of freckles and sunburns.