Polarized Sunglasse : What is it?
| Polarized sunglasses are designed to reduce glare from direct sunlight, the sun reflecting on the water surface, and light coming from a computer screen. The reduction of glare allows the wearer to see better in bright conditions, making polarized sunglasses ideal for fishing, golfing, boating, driving, and surfing. They usually come in black, silver, dark gray, green, amber, and blue tints.
Because they are made of polarized lenses that filter scattered and reflected light, polarized sunglasses are not ideal for all conditions. In downhill skiing, for example, it may be difficult to distinguish changes in terrain and ice patches quickly when wearing them. Wearing polarized sunglasses can also prevent motorcycle riders from distinguishing slick spots on the road. These types of sunglasses are also not recommended for pilots because they can create blind spots and make it hard to read LCD instrumentations. |
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Kinds of Polarized Sunglasses include the following: |
.75mm polarized lenses
These types of polarized lenses are made from thin sheets of film, and are ideal when impact resistance is not that important.
1.1mm polarized lenses
These types of polarized lenses are made from thicker sheets of film. They offer more impact resistance than .75mm Polarized Lenses but have the same thickness of polarizing layer. They are also more expensive than .75mm polarized lenses, but they do not offer more glare reduction or more polarization. |
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Test tag: Look for polarized sunglasses that come with a test tag or lens sticker that can verify their polarized property. To use the test tag, look at it through the lenses and rotate it to 90 degrees. The test tag should become noticeably darker at some point to indicate that the sunglasses are really polarized. If the sunglasses do not come with a test tag, you can still test them by getting two pairs of polarized sunglasses and looking through both of them while rotating one pair to 90 degrees. There should be an obvious blocking of light if both pairs are polarized.
Magnifiers: Look for polarized sunglasses with bifocal magnifiers in the lenses to make them easier to read with or to tie a hook or a fly with. |
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