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UV Radiation
UV Radiation and human health
What is in the book?
Chapter: Sun
UV radiation and human health
Skin disorders
Suntan, sunburn, photoageing, sensitivity
Non-cancerous growth
Skin cancer
Eye disorders
Degeneration, sunburn, sensitivity
Cataracts, non-cancerous growth
Eye cancer
Circadian rhythm disorders
Melatonin
Seasonal Affective Disorder (SAD)
Be sun-smart
If you expose your eyes, skin and immune system to the sun, a photochemical reaction in proteins and your DNA occurs. Too much exposure to UV radiation temporarily or permanently alters the function of cell components.
In the short term, tiny blood vessels can burst and redden the skin or the eyes. Sunburn of the skin and inflammation of the eyes (e.g., snow blindness) may follow.
While these effects are reversible, further exposure can lead to permanent damage, such as the clouding of eye lenses, otherwise known as cataracts.
While the sun is the major source of UV radiation, some man-made sources also produce high levels of UV light.
Tanning devices, such as sun beds and sun lamps, emit mostly UVA, but some radiate UVB as well. The processes of arc welding and sterilization of medical equipment produce UV radiation. The white light of quartz halogen lamps is becoming increasingly popular at work and at home, but unshielded globes expose you to harmful UV radiation, especially at close quarters.
