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Lens Options
Lens Materials
Polycarbonate Lenses
Polycarbonate lenses are thinner, weigh less, and are more scratch and impact resistant* than plastic lenses with the same prescription. This makes polycarbonate the smart option for children, sports and safety glasses.
*No lenses are unbreakable or shatterproof.
High-Index Lenses
High-Index materials are denser and can refract, or bend light to a greater degree than glass or plastic lenses of the same thickness. The same correction can be gained from a less curved and therefore thinner and lighter lens when made of a high-index material than glass or plastic.
Plastic Lenses
Plastic is a standard lens that is lighter weight than glass. Plastic lenses are available in
single vision, bifocal, trifocal and progressive lenses.
Eyeglass Lenses, Single Vision and Multifocal
Single Vision
Single Vision eyeglass lenses have only one correction or prescription for each eye, unlike bifocal eyeglass lenses which are an example of multifocal lenses. Whether you are farsighted or nearsighted, there are many options for enhancing the comfort and function of your new glasses.
Multifocal
Multifocal eyeglass lenses have more than one correction prescription for each eye. They can be either bifocal or trifocal. Bifocal lenses have two different corrections, one to help you see better both up close and another for far away. Trifocal lenses add a correction for the intermediate range.
No-line Progressives
No-line Progressive eyeglass lenses provide a natural transition of prescription change as
opposed to the traditional multifocal lenses, which have distinct viewing areas. They provide a smoother more single vision look without the distraction of the visible unsightly lines that separate the different correction areas of traditional progressives. They are usually prescribed for people whose focus has declined due to presbyopia.
Lens Enhancements
Anti-relective
Anti-reflective coated lenses help reduce reflections, glares and halos that can be reflected off the inside, back of a lens, and interfere with your vision. Anti-reflective lenses also appear clearer, improving the look of you glasses.
Polarized
Available for sunglass lenses, polarization allows only direct light to pass through to the eye. Polarized sunglass lenses prevent horizontal light, like reflections and glare that would interfere with vision from passing through. The result is a much cleaner, sharper view. These make great driving glasses and for those that are around water.
Photochromatic Lenses
Transition lenses are photochromatic lenses. Photocromatic 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 Transition lenses are as clear as regular lenses. Outdoors, when exposed to the suns 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 is all automatic!
While Transition lenses meet the everyday needs of the majority of the people, the truth is one pair of glasses cant do it all. For example, while driving, the windshield of the car blocks the majority of the UV rays that causes the photochromatic lenses to darken. In this case, many wearers find it can be helpful to have a second pair of prescription polarized sunglasses or prescription sunglasses.
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