LENS

SV lenses have the same correction or power over the entire lens. Single vision lenses are commonly made into single vision distance lenses or single vision reading lenses.

BF lenses have two different powers that are separated by a segment line. In general, the top portion of the lens is used to correct the distance vision and the bottom portion of the lens is used to correct the near vision. Bifocal lenses can often times be limiting because there is no intermediate range of vision.

TF lenses have three different powers that are separated by two segment lines. The top portion of the lens is used for distance vision, the middle portion of the lens is used for intermediate vision and the bottom portion of the lens is used for near vision. Trifocal lenses are often considered cosmetically unappealing because of the multiple segment lines.

Progressive lenses are similar to trifocal lenses because they offer distance, intermediate and near vision correction, but without the segment lines. Progressive lenses are what people commonly refer to as no-line bifocals. Progressive lenses are cosmetically appealing because there are no visible lines, but progressive lenses require a learning or adaption period to adjust to the lens design. New progressive wearers sometimes report a swimming or dizzy feeling. However, with the newly designed HD (high definition) progressives the swimming and dizzy feelings are eliminated leaving distortion free vision.

HD progressives offer superior vision compared to traditional progressives because the powers are digitally surfaced using free-form design technology. This technology reduces peripheral distortion and creates a wider field of vision. HD progressives are easy to adapt to because they eliminate the swim effect and provide a natural transition between distance and near vision.

If you have tried a traditional progressive before and were unsuccessful or a progressive "non-adapt," it is time to try an HD progressive!

For current progressive wearers, it is time to upgrade your vision to high definition! If your TV is an HD TV shouldn't you be wearing HD progressives?

Computer lenses are designed to meet all your computer and reading needs. These lenses are designed for optimal focusing at intermediate and near range relieving eyestrain and neck strain. If you speed more than 4 hours a day on the computer and you experience eye fatigue and blurred vision at the end of the day, you need computer lenses!

A basic plastic material used to make lenses. This material is used commonly for low prescriptions and for people that want a budget lens.

Polycarbonate lenses aka "feather weight" lenses are thinner and lighter than CR-39 lenses and have a UV blocking coat, anti-scratch coat and are impact resistant. Polycarbonate lenses are commonly used in sports glasses, safety glasses and in children's glasses because of their shatter proof property.

Hi-index lenses range from mid to super hi-index and offer thinner lenses for high prescriptions. Hi-index lenses also come standard with anti-UV and anti-scratch coating.

Glass lenses are infrequently used because of their tendency to shatter easily, their heavy weight and high cost to produce. The main benefit of glass lenses are that they do not scratch easily.

Anti-Reflective Coating allows you to experience the most clear and sharp vision possible with your lenses. ARC cuts the annoying glare and reflections that can bounce off your lenses. The elimination of glare allows you to use the computer without the annoying glare from the monitor. ARC also makes night driving safer by eliminating the glare from ongoing cars.

Transition lenses darken when exposed to UV light such as when outdoors and lighten back to a clear lens when indoors. Transition lenses are a convenient alternative to a separate pair of prescription sunglasses. However, transition lenses do not darken significantly behind the windshield of a car since the windshield blocks the UV needed to activate the lens to darken.

Polarized lenses offer the best vision in sunglasses because they reduce the glare from reflecting surfaces such as lakes, ski slopes and the hood of a car. Polarized lenses reduce glare by eliminating the light transmission of horizontal light waves. If you suffer from glare while driving or play outdoor sports, polarized sunglasses are for you.

Drivewear lenses are polarized transition lenses. By combining polarization with transition they offer the best sunglasses for people that drive a lot or people that spend a lot of time outdoors. Transition lenses alone do not darken significantly behind the windshield of a car and polarized lenses although they block glare, are sometimes too dark for driving in overcast conditions. Drivewear eliminates the limitations of transition or polarized lenses by merging the two!

Tinting allows you to change the color of your lenses. Tints can be as dark or light as you want and tints come in virtually every color.

UV coating blocks the transmission of harmful UV rays and is recommended for everyone. UV coating is like sunscreen for your glasses and help to protect the delicate structures of your eyes.

Scratch coating helps to reduce or minimize the scratches on your lenses. Scratch coating is a hard coat applied on top of the lens to help resist scratching, but will not eliminate scratches completely.