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No Line Bifocal Reading Glasses
What are no line bifocal reading glasses? Sometimes called progressive lenses, no-line bifocal reading glasses eliminate the sharp lines across the lens traditionally associated with bifocals and trifocals and disguise the fact that you are wearing reading glasses. "Just enough" focus. Really "multifocal," these no line lenses also provide a progressive correction of your vision that makes getting used to them easy. There is no area of the lens that you have to use exclusively for looking at objects in the distance or exclusively for doing close work. The progressive correction enabled by no-line bifocals enables you to move your eyes "just enough" to focus clearly on the objects you wish to see. Top to bottom vision correction. A no line bifocal lens offers a vertical corridor of vision correction that runs up and down directly in front of your eyes. The optometrist or ophthalmologist takes precise measurements of your eyes to position this corridor of vision correction at the optimum location so your eyes easily access the various powers of the lens for just the right focus at any distance. This eliminates the major complaint with traditional bifocal and trifocal lenses known as image jump. No more image jump. With traditional bifocal lenses, the objects you see seem to "jump" past your eyes when your gaze goes over the sharp boundary between the upper and lower parts of the lens. With no line bifocal reading glasses, however, the transition between the various lens strengths is seamless, letting you change your focus from far to near and back again with ease. With no-line bifocal reading glasses, you can look up from your desk to see across the room without needing to move your eyes up and down. You can see far, near, and intermediate distances equally clearly. And your no line lenses enhance a youthful appearance. Stylish options for frames. No line bifocal reading glasses used to have to be set in large frames. That was because of all the different strengths required of the lens. New lens materials, however, have enabled manufacturers to make "short corridor" lenses with compact designs and large zones for close work or reading. Whereas the choice of frames used to be limited, now there are many choices. No-line bifocals can be made from plastic, glass, polycarbonate, or photochromic materials that darken when you go outdoors. Your ophthalmologist or optometrist is best able to help you choose the right material for your lens. No matter which lens material used in the lens, however, no-line bifocals usually require a brief period of adjustment. You really need to be aware of this before you drive out the parking lot. What you need to know before you start using no-line bifocals. No-line bifocals let you see clearly at all distances directly in front of you, but they can cause minor distortions of images in the periphery of your vision. That is, you see well straight ahead and up and down, but you may not see as clearly to the right of left. It is very important that you are aware of this the first time you drive wearing your new glasses. The left-right distortion can cause a sense of "swimming" the first time you clear traffic. If this happens to you, just make a slight movement of your head to the right or left to look more directly at objects. The "swimming" effect, however, usually disappears in a few hours to a few days, and many wearers of no-line bifocals never experience it at all.
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