Sunglasses eyes
Sunlight to be infinity, but it has a bad effect on you . Only the eyes The only thing that can prevent ultra -violet light source to light. Sunny, well that is the " sunglasses" . Sunglasses are a must The goggles can prevent ultra -violet light to pass through the eye.
The sun shines down on the earth . Are both visible to the naked eye . And light waves that are
invisible to the naked eye is called ultra -violet light . Or the area that wave ultraviolet light which has
a wavelength less than 400 nm. Divided into UV- A , UV B and UV- C and UV light , but only UVB light
can only pass through the surface. Which are toxic to humans, such as skin cancer, cataracts , pterygium ,
macular degeneration , etc. .
Sunglasses should be standardized . UVA rays can prevent at least 80 percent of UV light or allow
through only 20 percent , which relies on the measurement tool .
Usually, sunglasses with UV protection can be a little like plastic lenses , which block UV light
than glass lenses. Given that the lens can block UV . Likely to have better UV protection lenses
not listed. Sunglasses are Polarized Lens lenses that cut glare well. Makes users comfortable It can filter
UV little.
In
choosing your next pair of sunglasses . Do not forget these tips as an aid in
the selection. And ... do not forget that sunglasses do not necessarily have to
cost the earth .
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