| LENS DESIGNS
Single Vision – this all-purpose lens is available in all materials (plastic, polycarbonate or glass), and can be used for either distance or near vision correction. Single vision lenses can be made for intermediate (between distance and near) vision for special vision needs such as computer, hobby or piano glasses.
Multifocals – will be suggested when both distance and near correction are needed together in a single lens.
No-line progressives – correct for far (driving a vehicle), intermediate (viewing the dashboard), and near (reading a map) vision all in one lens. Because there is no visible line, progressives have the appearance of single vision lenses and are, therefore, the most cosmetically desirable multifocal. Progressives are available in all lens materials.
Bifocals – provide both far (driving) and near (reading a map) correction in one lens.
Trifocals – are basically progressive lenses with visible lines. The majority of the lens is for distance viewing, while the center portion is divided into intermediate and near-viewing segments.
Thinner, flatter lenses – are recommended when a prescription is either “high-minus”, meaning lenses are thicker at the outer edges, or “high-plus”, when lenses are thicker in the middle. Flatter lenses enhance lens appearance by reducing edge or center thickness. They are lighter weight and can provide edge-to-edge visual clarity by utilizing an aspheric or atoric design.
Aspheric – offers less magnification or minification of the eyes, as well as in images viewed. Edge-to-edge visual clarity means that as the eyes move, vision will remain clear rather than “blur out” when the viewer looks away from the center of the lens.
Atoric – also helps reduce visual aberrations, allowing for a wider field of view as well as a cosmetically pleasing slim and lightweight lens. Ask your dispenser which flatter lens option – aspheric or atoric – is better for your particular vision correction.
Specialty lenses – are recommended when certain work-related and hobby or other recreational uses require task-specific viewing for the best visual protection and/or performance.
Computer lenses – if you’re viewing a computer video display terminal for more than two hours a day, you may need variable focus lenses. These lenses help correct vision for the specified length of your eye to the computer screen and the immediate vicinity. A variety of computer-specific lenses include special filters, tints, and anti-reflective properties.
Sometimes called Transitions® or “comfort” lenses, photochromic lenses darken and lighten according to light exposure. If the wearer is in the sun, photochromics darken, if indoors, the lenses are clear. Photochromic lenses are available in virtually all lens materials and lens designs. Ask your eye care professional for a demonstration.
UV protection – the sun’s ultraviolet rays pose potential harm to your eyes. UV protection on lenses accomplishes the same thing as sunscreen lotion on your skin – it shields your eyes from harmful ultraviolet rays. Plastic and glass lenses may require UV coating, while high-index and high impact resistant lenses provide UV protection inherently in the lens material.
Scratch-resistance coatings – recommended to protect lenses form everyday wear-and-tear. Some materials, such as high impact resistant, high-index lenses, and several new plastic lens designs, include scratch protection. No lens is "scratch proof", but a scratch-resistant coating helps protect the integrity of your lens.
Anti-reflective – dispensers suggest anti-reflective, or AR lenses to help reduce eye fatigue in all situations, particularly while viewing computer screens and driving at night. In addition to enhancing vision by removing distracting reflections, AR lenses are cosmetically desirable, as the wearer’s eyes are clearly visible behind the lenses.
Polarized lenses – are the top pick for eliminating glare. Boaters, 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 to clear at the bottom of the lens.