Many girls like to wear fashionable big fake oakleys, commonly known as "yurt", and some even cover his face. As everyone knows, sunglasses is not always better.

Because people face width is limited, and sunglasses in addition to the width of the lens, plus middle bracket of the horizontal degrees. If the lens is too large, covering people's faces when the curvature will produce change. Under normal circumstances, within the arc of 10 degrees is safe, once more than 15 degrees curvature of the lens, the refractive index of the lens receiving light will change, things will see rugged, long wear cheap oakley sunglasses and easy to make eye fatigue, dryness, damage eyesight .

Learning four: the driver should choose polarizer

When the sun projected on the road or water, the direct stimulation of the eyes, the eyes are dazzling, fatigue, depending on the material can not be sustained. Especially in terms of driving a car, likely to influence their judgments and dangerous images. Long-term withstand direct sunlight, can lead to the rapid decline in vision, the formation of myopia, hyperopia, astigmatism or cataracts.

Polarizer filter out glare effects is to make clear cheap oakleys vision of nature, especially for drivers to wear. As the blinds of the principle of light is adjusted to the light and into the interior with natural scenery looks so soft and not harsh.