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It’s always best to place your sunglasses in a case when you aren''t wearing them. Not only will it help in venting them from becoming scratched, but it will also protect them from accidentally breaking, like someone sitting on them. Avoid placing your glasses without a case in your purse or pocket. Keys or combs can easily scratch them. When not using a case, do place your sunglasses on folded temples with the frame facing upward shoppingwatch if you leave them on a table or any other hard surface. Cleaning clean dust and lint from your lenses with a soft cloth. An excellent suggestion is the cloth, which we stock in all of our stores. Using a micro clair will ensure that the lenses do not become scratched. To remove shoppingwatch smudges, oils, and/or fingerprints, we recommend using a lens cleaner or washing the lenses with a mild soap and water.

Glass is more scratch-resistant, than plastic. Cr-39 optical quality plastic, made of hard resin, is considered the best plastic for lenses. It weighs half as much as glass, which means it is not heavy on the face. It exceeds fda requirements for impact-resistance because of its comparatively loose molecular structure. A remarkably strong plastic - in fact, aircraft windshields, motorcycle windshields, shoppingwatch and sport safety glasses are made of polycarbonate because it is so strong. Compared to cr-39 and glass, polycarbonate plastic weighs the least and is the most impact-resistant. 20 times more impact resistant and 3 times lighter than glass. A good choice for those who want really rugged sunglasses: for people who engage in outdoor activities and fast-action sports. Polycarbonate is widely used, and is considered the second optical plastic. Its major drawback shoppingwatch is that it is soft and susceptible shoppingwatch to scratching and abrasion. It must be hard-coated to raise its scratch-resistance to that of cr-39.

The eye can only see white flashes, such as, light reflecting shoppingwatch off car bumpers on a sunny day. It is so intense that it overwhelms the eye with blinding light, masking what is behind the glare. It can seriously impair vision and create dangerous situations when driving, boating, or skiing. Long-term, it causes excessive wear and fatigue on the eyes. Your eyes we expect a lot from our eyes. During shoppingwatch a normal day, the eyes will use about the same amount of energy as the legs shoppingwatch would use in walking fifty miles. This and the additional burden shoppingwatch of glare cause the eyes to strain to see well. Wearing sunglasses will reduce or eliminate this strain, cut the impact of harsh glare and eliminate the need to squint. Sunglasses also offer protection against something very serious - ultraviolet radiation (uv). Visual acuity, contrast, and overall sensitivity can be reduced by up to 50%, due to the sun’s sustained bleaching of the photochemical rhodopsin in the rods of the retina.

Click here - Click here to go to our online catalog of watches. We have the best selection of brand name watches and accessories.

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