Purchasing the right sunglasses

Written by Timothy Gorman

Sunglasses come in many different styles shapes, colors and even Designer Brands. They can be purchased for as low as $5.00 and go as high asrepparttar upper hundreds. But it is not all about personal preference and making a fashion statement. The true function of sunglasses is protection from Ultra Violet Rays.

There are different lenses to choose from when out onrepparttar 146160 hunt for sunglasses. * Blue blockers are usually found in amber colors. They are popular with skiers, boaters and especially pilots due torepparttar 146161 fact that they block out that blinding blue light. * Photo chromic lenses arerepparttar 146162 lenses that adjustrepparttar 146163 levels of darkness according torepparttar 146164 level of Ultra Violet Rays that are being exposed. * There are also Mirror coated Lenses; they arerepparttar 146165 best for limitingrepparttar 146166 amount of light in. * Gradient Lenses are another type of lens that you find on sunglasses. They are darkest onrepparttar 146167 top and gradually get lighter asrepparttar 146168 tint reachesrepparttar 146169 bottom ofrepparttar 146170 lens. They are extremely helpful to people who drive for a living. The other Gradient lens is called double gradient. These lenses are darkest on top and bottom with lighter tint inrepparttar 146171 center ofrepparttar 146172 lens. They are also not recommended for driving.

Prescription eyeglass specialty lenses

Written by Timothy Gorman

There are many different lenses that have been specially created for certain purposes and needs.

An aspheric lens is one ofrepparttar lightest weights of all lenses. They are available in bifocal or single vision prescription eyeglasses. The Allyl Resin plastic lens is also very light in weight. They do not offerrepparttar 146159 protection from ultra violet rays that other lenses offer. The best lens onrepparttar 146160 market isrepparttar 146161 High index plastic lens. It offersrepparttar 146162 highest level of ultra violet ray protection. It is light in weight and thin. It is alsorepparttar 146163 most expensive lens to purchase, but by far it isrepparttar 146164 highest quality lens, as well.

There are also many different coatings that can be applied to your prescription eyeglasses. It can be done byrepparttar 146165 lens manufacture or at most Optometrist offices'. Photo chromic coating adjusts torepparttar 146166 intensity of light that it is exposed to. The come in brown or gray tint, and are available in glass or plastic.

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