UV Exposure eye protection and sunglasses
Ultraviolet eye protection is important. UV exposure can lead to skin cancers in the eyes and on the eyelids and damage cornea, lens and other parts of the eye. UV can also contribute to the development of certain type of cataracts and possibly macular degeneration. Remember to choose sunglasses that block 100 percent of UV rays (UVA and UVB) and protect at least 75 percent of visible light. Some manufactures use labels saying ‘UV absorption up to 400nm’. This is ok as is equivalent to 100 percent UV absorption.
Both plastic and glass lens can protect from UV rays but absorption is improved adding chemical in manufacturing or applying special coating. The colour is not an indication of the degree of protection lens offer. If you stay long in very bright conditions chose darker glasses.
Polarization has nothing to do with UV absorption. Polarized lens reduce glare from the water, ice, roof tiles, asphalt, concrete and sand and can be useful when driving, having fun on water or working outdoor but you have to check if the lens provide appropriate protection to UV rays as well.
If you stay in the light all the day long remember to choose models with wide lens absorbing the rays from every angle and possibly are closefitting and wraparound to protect the sides of the eye area.
To optimize prevention and skin health you need sun protection as much as you need vitamin D. You can have both and avoid either vitamin D deficiency and skin damage
In 2009 fears surrounding the risks of tanning were confirmed and today we know that skin cancers are associated with exposure to the sun’s ultraviolet (UV) radiation
When spending time outside in warm weather we may need using both insect repellents and sunscreens products
New Scientist Live, the world’s best science festival in ExCel London, is the stage to be launched FREE Download of HappySun app.
Tanning is a fairly recent trend and even today the ‘ideal’ skin colour varies among different cultures