Ultraviolet radiation from the sun can damage skin, eyes, and the immune system. It causes skin damage like sunburn, premature aging through wrinkles and spots, and precancerous skin changes. The eyes can be temporarily injured and develop problems like cataracts and loss of vision over time. The immune system may become weakened, increasing risk of infection. However, some UV exposure provides benefits as it allows vitamin D production and can treat skin conditions like psoriasis and eczema.

1. Health effects of ultraviolet
radiation
There are many health
risks that are facing
humanity.
Few of them are :
Skin damage
Eye damage
Weakened immune
system

2. Skin damage
A tan is visible proof that your
skin has been damaged by UV
rays. Tanning is your skin's
response to overexposure to
UV rays. Sunburn is also
caused by too many UV rays
Overexposure to UV rays also
causes premature aging effects,
like:
skin wrinkling and
hardening (leathery
skin)
blotchiness
loss of elasticity
dark patches ("age
spots" or "liver spots")
precancerous skin
changes (called actinic
keratoses)

3. Eye damage
Too much exposure to UV rays may cause painful
temporary injuries to your eye & it can
prematurely age your eye lenses, causing
clouding causing clouding of the lens (cataracts),
non-cancerous growths of tissue (pterygium), loss
of vision (macular degeneration), and cancer of
the eyelid.

4. Weakened immune system
The Immune System, witch is your body's
natural defense against disease, can loss its
ability to resist bacteria, which increases your
risk of infection.

5. On the other hand,
there are some benefits
of UV radiation
Vitamin D
production
Treatment of skin
conditions

6. Vitamin D production
Vitamin D helps your body absorb calcium and
phosphorus which plays a big role in bone development.
The UVB part of sunlight is what creates vitamin D in
your skin. However, season, time of day, cloud cover,
smog, skin pigmentation, and sunscreen use are all
factors that can affect the amount of UV rays you
receive.

7. Treatment of skin conditions
UV rays have been used to successfully treat a number of
diseases, including rickets, psoriasis, eczema and vitiligo