Naturally, your primary reason for wearing shades is to have protection from the sun's UV rays. If you want to check the UV index map in your place, log on at AccuWeather website which is being updated daily. A good pair of sunglasses can block a hundred percent UV rays and takes up a lot of high energy visible rays (HEV rays).
A good number of sunglasses can take up a certain amount of UV saturation. Approximately 88% of UV light can be absorbed by CR-39R plastic lenses.
Polycarbonate sunglasses can take up 100% of UV rays. ray ban frames for men Optical stores selling polarized non-prescription sunglasses are 100% UV absorbent. About 40% of UV rays are taken up by low quality shades that have triacetate.
Normally manufactured from acrylic materials, low-priced lenses can only offer about 50% eye protection. Thus, it is advised to buy sunglasses from stores with good reputation as you can be assured of getting 100% UV rays protection.
Your perception of color saturation and brightness may change with some sunglasses lenses. Neutral density gray lens color will regularly sunglasses darken the colors but not totally alter your color perception. A G-15 tint, which is a mixture of green and gray, is highly suggested. Ray-Ban, which is the brand of sunglasses created by Bausch & Lomb for pilots, used this type of shade.
Cloudy day sceneries become brighter with brown polarized lenses because of the warm glow that the brown tint gives off. Lenses that are polarized cut out the light from the meridian horizontally and permit the light from the meridian vertically, thereby blocking the light that replicates reducing ray ban caravan 3136 the glare. This is a good choice of lens for those who spend most of their time outdoors. To make sure that you are getting the proper protection, you can always have your sunglasses checked by any optical shop or eye care stores.
Aside from wearing big hats, people who spend a lot of time doing their chores outside like gardening should also wear sunglasses which are of good visual value giving them 100% UV protection.
Bear in mind that the price does not matter much. What is important is that the shades give you the protection that they are supposed to extend. Good quality sunglasses chips can also be fitted to your frames.
Wearing sunglasses especially outdoors is a MUST that we should not ignore. Our eyes are very essential and we should take good care of them.