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Frequently Asked Questions

What are Anti-Reflective Lenses?

Anti-reflective or antireflection (AR) coatings are a type of optical coating applied to the surface of lenses and other optical devices to reduce reflection. This improves the efficiency of the system since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.

Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.

What are CrystalCLEAR A/R Lenses?

Why settle for regular eyeglass lenses when you can have CrystalCLEAR? CrystalCLEAR lenses out-perform regular lenses by helping you to see better, feel better, and actually look better when you are wearing your glasses. These virtually invisible lenses are extremely durable, scratch resistant, and easy to clean. State-of-the-art, no-glare properties are combined with double-sided scratch resistance and a finish that repels water. CrystalCLEAR lenses eliminate reflections that cause eyestrain and fatigue, especially from fluorescent lighting and computer screens. They resist dirt and smudges, so you do not have to clean them as often. With CrystalCLEAR, you not only look better—you feel better, too.

What are Invisible (no-line) Bifocals?

These bifocals have no line and therefore, they look like single vision lenses so nobody can tell that you are wearing bifocals. These lenses give you clear vision at all distances, unlike lined bifocal lenses which usually have a blind spot at 20 to 30 inches, or an average arms length distance. The invisible bifocal lenses are said to be the closest to natural vision.

What are Mirrored Lenses?

Mirrored lenses reduce the intensity of light to an even greater extent than regular sunglasses, making them a great choice for very bright conditions. Mirrors can be opaque or semi-opaque when viewed from the front, affecting whether or not others can see your eyes.

What are Polarized Lenses?

Polarized lenses are used in sunglasses to reduce glare from reflective surfaces such as the surface of a lake or the hood of a car. They accomplish this feat through a process called polarization, much like a Venetian blind controls sunlight through a window.

What are Polycarbonate Lenses?

Polycarbonate lenses are thinner and lighter than traditional plastic eyeglass lenses. They also offer 100% ultraviolet (UV) protection and are up to 10 times more impact-resistant than regular plastic lenses. This combination of lightweight comfort, UV protection and impact resistance makes polycarbonate lenses an excellent choice for children's glasses, sports eyewear and safety glasses. Because they are less likely to fracture than regular plastic lenses, polycarbonate lenses are also a good choice for rimless eyewear designs where the lenses are attached to the frame components with drill mountings.

What are Progressive Lenses?

Progressive lenses, sometimes referred to as no-line bifocals, not only provide visual correction for distances that traditional bifocals can't, but they also hide the fact that you even need reading glasses. No one else has to know whether you're sporting a pair of glasses just for fashion — or because your arms have "grown too short" to allow you to see up close. Progressive lenses are the closest to how natural vision is (before the onset of presbyopia) that you can get in a pair of prescription eyeglasses. They are more than just a defined near and distance correction in one lens. Rather, progressives provide a smooth transition from distance through intermediate to near, with all the in-between corrections included as well. This constant graduation of the prescription means that you can look up to see in the distance, look ahead to view your computer in the intermediate zone, and drop your gaze downward to read and do fine work comfortably close up.

What are Transitions® Lenses?

Transitions® lenses change, so you don’t have to...

* If light conditions remained as constant as they are in your eye care professional’s exam room, you wouldn’t need anything more than clear lenses in your glasses. But think about how many times you move from indoors to outdoors and from sunny skies to overcast. Each and every time you do, your eyes must try to adapt to that changing light, often making it difficult to see objects clearly and making your eyes feel tired and uncomfortable. That’s why we recommend Transitions® lenses … lenses that conveniently and automatically change as light changes, so you can see better everywhere you go – without ever having to change eyeglasses

* Transitions® lenses are photochromic lenses. "Photochromic" means the lenses change from clear to dark in the presence of ultraviolet (UV) radiation, such as when exposed to sunlight. Indoors and at night, Transitions® lenses are as clear as regular clear lenses. Outdoors, when exposed to the sun’s UV rays, they turn sunglass dark, enhancing the quality of vision by reducing glare (thereby minimizing eye strain and fatigue) and improving contrast in all light conditions. And it’s all automatic.

* UV 400 Protection. But Transitions® lenses don’t stop at improving visual quality and visual comfort. Like your skin, your eyes need sun protection too. Transitions® lenses provide UV400 protection, blocking 100% of damaging UVA and UVB radiation and helping to preserve your long-term eye health.

* Convenience and protection can be fashionable, too. Transitions® lenses are compatible with virtually all frames and are available in a wide range of lens materials and prescriptions. Chances are, if your prescription is available in a clear lens, it’s also available in a Transitions® lens. Everyday lenses that can help you see better today … and tomorrow. If you ever have to squint or strain your eyes in sunlight, or have trouble seeing objects clearly in bright sunlight, chances are your everyday eyeglasses could do a better job of providing you with all-day, automatic visual quality, comfort and long-term protection. Ask your eyecare professional about lenses that can help you see better today and tomorrow. Simply put, Transitions® lenses are not just as good as clear lenses, they’re clearly better.