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Bay Eyes Spectacular Eyeglass Lenses Single Vision: Single vision lenses function as all purpose glasses for persons who have normal accommodation. Persons who normally wear bifocals or trifocals can use single vision for distance or near lenses. Single vision lenses can also function as occupational glasses for certain types of work. Single vision lenses are available in all lens materials. Aspheric Lenses: These lenses provide special visual and cosmetic benefits for stronger corrections and increase edge to edge clarity. Flatter than conventional lenses, aspherics eliminate the "bulgy" appearance of strong plus lenses and greatly enhance the appearance of finished eyewear. Persons with strong nearsighted corrections also benefit from thinner, lighter weight glasses when their lenses are aspheric. Because aspheric lenses are positioned closer to the face, there is less eye magnification with farsighted corrections and less of the "small eyes" look with nearsighted corrections. Aspheric lenses are often made of high index materials for the ultimate in thin lenses. Flat-top Bifocals: This is the most popular bifocal format and is available with the bifocal portion made in a variety of widths to help with various close-up occupations. Flat-top bifocals are made in every type of lens material. Franklin-style Bifocals: Sometimes used for those who needs a wide field of vision for near work (accountants, for example). Franklin style bifocals have a distinctive appearance and are thicker because of their design. They are generally only available in glass, hard resin, and photochromic glass. They are being replace by wide flat-top bifocals. Trifocals: Trifocals come in a variety of designs. Flat-top trifocals are the most widely used form. The added segment provides clear vision at arm's length distance, the area that is usually blurred for bifocal wearers. Trifocals are available in all lens materials. Progressives (no line bifocals): These lenses provide all the benefits of bifocals but add the feature of continuous clear vision at all distances, including mid-range distance (arm's length). Progressives have the cosmetic advantage of appearing to be single vision lenses so they never reveal that the wearer if using bifocals. Progressives are available in all lens materials and also made in aspheric form. Because of their many benefits, they are becoming the lens of choice for bifocal and trifocal wearers. Occupational Requirements Sports Glasses - All sorts of special lens designs are available for the needs of sports enthusiasts. Polycarbonate is the material of choice for active sports. Polarized sun lenses that eliminate reflected glare are especially appropriate for drivers, fishermen, hunters, and all types of outdoors activities. Computer Glasses - There are a variety of options for those who use computers. These include special filters and anti-reflection coatings. Optional Lens Treatments Scratch Protection Coating: Light weight hard resin lenses can be more easily scratched than glass lenses. Special coatings have been developed to help protect lenses from normal scratching. The modest additional cost for such scratch coating is a prudent investment. UV Protection: It is generally accepted that the ultraviolet rays in sunlight pose potential harm to the eyes. Special treatment for hard resin lenses completely blocks hazardous UV light. Lenses like polycarbonate and high index include built-in UV protection. Anti-reflection Coatings: Special anti-reflective coatings, much like those used for fine camera lenses, are available for spectacle lenses. These coatings are particularly effective for reducing eye fatigue for computer operators and anyone driving at night. And, of course, AR lenses enhance appearance by removing all distracting reflections. Lens Materials Hard Resin (plastic): Conventional hard resin lenses are half the weight of glass lenses and can be tinted to almost any color and density. Hard resin lenses are more easily scratched than glass but can have an optional scratch protection applied. More impact resistant than glass, hard resin lenses do not require heat treating. Lighter, thinner lenses: Modern technology has created lenses that bend light differently so that stronger corrections are thinner than when made in conventional materials. Such lenses are called "high index" and stronger corrections are more attractive because they are thinner. Glass lenses are also available with the slimming advantages of high index but are considerably heavier. High index plastic uses less material so that lenses are often lighter in weight. High index lenses absorb all harmful UV light and can be tinted to any shade or color. Lenses that darken in the sun: These photochromic lenses darken as you go from indoors to outdoors. They are available in both glass and lightweight hard resin. They darken to a moderate shade of grey. A demonstration of these lenses is the best way to learn about their properties. Polycarbonate: This is the most impact resistant lens material available and are always the lens of choice for young people and other active clients. Polycarbonate lenses are high index and are usually the lightest, most comfortable lenses. They absorb all harmful UV light and can be made with ultra thin edges because of their unique strength. Glass: For years, glass was the only lens material available and glass still offers superior optics. The most scratch-resistant material, the primary disadvantage of glass is its weight, generaly twice that of hard resin. Glass lenses are heat or chemically treated to increase impact resistance. Sun Lenses Polarized Lenses - are the top pick for eliminating glare. Hunters, boaters and fisherman, golfers, and drivers are a few who benefit from polarized lens glare-cutting properties. Any surface can create glare in sunlight, including water, sand , snow, windows, vehicles, and buildings. Polarization eases eye stress and fatigue in the sun, and comes in several color and density options. Tinted Lenses - the majority of lenses can be tinted from light to very dark. Tints for sun lenses are usually medium to dark shades, and can be solid through the whole lens, or gradient, darker on top fading to lighter or clear at the bottom of the lens. Tints also come in a rainbow of color options. Mirrored Lenses - not only look cool, they are cool. Mirrored coatings provide a reflective surface that makes the eye virtually invisible to viewers, while keeping the wearer's eyes protected from glare and heat. Mirrors come in a variety of colors to enhance tints and visual performance. A Lens For Every Lifestyle... What's your lifestyle? When it comes to choosing a lens, one style no longer fits all. Athlete
Computer Specialist
Fisherman
Indoor/Outdoor activities
Driving/Working/Everyday
Your Lifestyle Your lifestyle will affect your eyecare professional's recommendations for various types of lens options. Consider your vision requirements for the following activities and discuss your choices with your eyecare professional team.
Rate the Importance of: High Medium Low Computer Glasses Reading Glasses Driving/Road Sport Glasses Sports Glasses Hobbies Special Interests
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High
impact resistance lenses