How To Choose Sunglasses

June 27, 2009 by Katerina

Choosing new stylish sunglasses remember that your first task is to protect the eyes from harmful ultraviolet rays.

Scientists distinguish three types of UV rays:

UVA rays are not the most dangerous, however they still can potentially cause damage to your eyes and should be evaded.
UVB rays are the shortest ones; they can penetrate deep into tissue, leading to cataract or keratitis (cornea desease).
UBC rays do not give us any concern as they hardly reach the Earth, being entirely stopped and absorbed by ozone.

Find out whether the sunglass provides sufficient UV protection. You wil find this information on the price sticker. It is not recommended to wear sunglasses with lower then 60-70% protection.

The blue light is considered to be the one you shall avoid the most. Wear your sunglass and take a short look to the sky. Usual blue colour should turn to greyish.

Polarization is another useful sunglass characteristic. You will most likely need it if you like waterskiing or similar sports, and do not want to endure a glare. Polarization means the reflected from water or snow sunrays, which induce glare, will be stopped by the filter in special layer on the lenses.