Spectacle lenses
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There are also progressive lenses, which have no line, and start with your distance prescription at the top and progressively move toward your full reading prescription at the very bottom. You look through it to see objects within arm's reach, like a computer screen. It sits above the bifocal portion of the lens. That’s due to presbyopia, an age-related change that affects your eye's lens. They’re usually prescribed for people over 40 who can’t focus well anymore. The upper part helps with distance vision. But today’s products often look seamless.īifocals. In the past, you could spot this type of lens by the line between the two sections.
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These have two or more prescriptions to correct your vision. If you're in your mid-40s or older, you probably have glasses with multifocal lenses, like bifocals or trifocals. Simply put, the lens is a tool you use to focus light onto your retina in the correct way. If you have astigmatism, your cornea is shaped wrong, so your lenses may be more like a cylinder. A convex lens (curves outward) will help if you’re farsighted. You’ll need a concave lens (curves inward) if you’re nearsighted. Your type of vision problem will determine the shape of your lens. But they can make it hard to see the liquid crystal display on your car’s dashboard.
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These lenses reduce glare from a surface like water, so they’re great for sports and driving. You may no longer need sunglasses, although they may not darken in your car if the windshield blocks UV rays. Sunlight changes these from clear to tinted. That means they can be thinner and flatter so you can use a much larger portion of the surface. If you need a strong prescription, these lenses are lighter and thinner than the old-school super-thick ones you may have had in the past.Īspheric. They may also correct vision better for some people. They’re lightweight, thin, and impact-resistant. They’re made from a newer plastic that’s similar to polycarbonate lenses. These impact-resistant lenses are a good choice if you play sports, work where your eyeglasses could easily get damaged, or have kids who are tough on their specs. The following lenses are lighter, thinner, and more scratch-resistant than glass or the older plastic types. These new ones are lighter, don’t break as easily as glass, and can be treated with a filter to shield your eyes from damaging ultraviolet (UV) light. Today, most are made of high-tech plastics. In the past, they were made exclusively of glass. What Types of Lenses Are Available?Īs technology advances, so do lenses. Instead, scope out the latest frames to give your face a fresh look. So don't fret if contact lenses bother your eyes. Eyeglasses today are fashion accessories, as stylish as purses and belts.