What is the basic function of sunglasses

When the eye when light is received, it will shrink naturally IRIS. Once the IRIS shrinks to the limit State, then people need to blink. If the light is still too much, such as snow reflected sunlight, will cause damage to the retina. High quality Cheap Ray Ban Sunglasses can filter as much as 97% of the eye light to avoid the hurt.

A good pair of sunglasses must have the following four functions:

Prevent the sun ultraviolet illumination

The ultraviolet radiation can damage the coea and retina; high-quality sunglasses can completely eliminate the ultraviolet irradiation.

To prevent the strong light

When the eyes to receive too much light, it will naturally contraction iris. Once the iris contraction to limit state, then they need to squint. If the light is still too much, such as snow reflected sunlight, will cause damage to the retina. Good quality sunglasses can filter out as many as 97% eyes light to avoid the hurt.

To prevent glare irradiation

Some surface, such as water, reflects large amounts of light, and so produce bright spot will disturb the sight or hidden objects. High quality Cheap Ray Bans sunglasses can completely eliminate the glare by polarized light technique; we will be introduced later polarization technology.

The elimination of certain frequencies of light

Certain frequencies of light will be blurred vision, and some other frequency of light can enhance the contrast. Choose the right color sunglasses; make it get better effect in certain circumstances.

If the glasses do not provide UV protection, it will bring you more exposed to ultraviolet radiation. Filter sunglasses cheap to the part of the light, causing your iris open to receive more light. This will allow more ultraviolet ray to enter, increases the damage of UV on the retina.

Therefore, between various Ray Ban Sunglasses really is a difference. According to the specific use of the environment, to choose the appropriate, quality sunglasses will provide maximum protection for your.