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With so many brands of sunglasses offering interchangeable lenses it can be difficult for the consumer to make an informed buying decision. Here are a few tips and qualities to look for when purchasing sunglasses with interchangeable lenses.
Purchase a pair of sunglasses that offer lenses for a wide variety of lighting conditions. The most important are bright lights, low lighting and high contrast. The ease at which you can change the lenses is also important as is the stability of the lenses once in place. You'll also want to make sure the lenses are of high quality and free of distortions which can cause eye fatigue. To check the quality of interchangeable lenses hold them at arms length and look through the lenses towards a straight line such as a door frame. Now move the lenses across the line and note if the line moves, distorts or curves. If any of these take place the lenses have imperfections.
The frame of the sunglasses is also important. Chose lightweight frames made out of durable material such as nylon for the most comfortable fit. For longevity try buying frames that will withstand extreme highs and lows in temperature without warping or cracking. The wrap around style of sunglasses with interchangeable lenses is very popular as it provides the best defense against harmful rays all around the eye area. Just be sure those lenses offer 100% UV protection.
Don't forget to have a look at those nose pads. It may seem inconsequential but if you purchase non-slip nose pads such as rubberized ones you'll be thankful for their ability to stay put even when you sweat.