Uva Filter

What is UV Light?

UV or ultraviolet light is a non-visible spectrum of light that surrounds us. Because the increase in cancer incidence skin, we know about the harmful effects of UV radiation on our skin, but we believe that UV can also damage your eyes?

UV is composed three wavelengths of light

UVA is closest to visible light range from 320 to 400 nanometers

UVB – 280 – 320 nm

UVC – 280 to 200 nm

UV can damage your eyes?

UVA and UVB can cause significant damage within the eye lens and retina. Also is harmful to the cornea – the clear window on the front of the eye.

UVA is the most dangerous, especially if exposed to low doses over a long period. It can damage the eye, but is absorbed by the lens. This protects the retina, but it affects the accumulation of pigments are generated within the lens, and aging and cataracts develop new exposure. When cataracts are carried out this vital filters to protect the retina left.

UVB rays cause burns and blindness snow, which is exacerbated by reflection from water and snow. The cornea absorbs its power to protect the internal structures of the eye but leaves the cornea vulnerable to problems. The pterygium is a disorder patch of tissue on the cornea develops as a result.

UVC is filtered by the ozone layer, but if you're in an area where the ozone layer is thin, then it can be dangerous.

Do I need UV protection?

Yes, if one of the following apply:

You spend time in the water.

You had cataract.

You spend more time outdoors.

Do you like wearing dark glasses.

You are regularly exposed to UV light.

You live in the ozone layer is thin.

What will protect my eyes?

With glasses, either dark or light that give protection against UV rays, but only full protection glass UV filter or polycarbonate. Other lens materials that provide varying degrees of UV protection.

Standard plastic – how are you lenses can yellow over time, manufacturers add a small amount of UV filter in the material. Dan approximately 92% UV protection.

Glass – which do not absorb to provide no UV protection.

Lenses that darken in the sun – sunglasses is due to UV light, so changing to block all UV.

UV Filter – This is a glass coating that guarantees to give 100% protection against all types of UV rays.

Sunglasses are often considered as providing protection against UVA, UVB and UVC. The problem with the list of these categories is that we see the symbol of UV rays and assume they are protected. You must ensure that the lenses filter question all types of radiation.

Do I need a pair of sunglasses with UV filter?

Our eyes respond to light living in reducing the size of the pupil. This prevents the light goes to the retina and lens. Thus a flood of light window in the eye, and without a UV filter, internal structures are fully exposed to the dangers of UV rays.

About the Author:

Anna is a fully qualified optometrist and eyewear fashion guru. Living in the east midlands (UK) she has recently become involved in TheInternetGlassesCompany.co.uk which specialises in high quality Cheap Glasses Online

Article Source: ArticlesBase.com – UV and Your Eyes

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