Progressive reading glasses without magnification on top are the type of multifocal lightweight reading glasses, with zero magnification on the top lens, which is designed to provide a seamless transition between near and far vision without a visible line.
Explained in more detail: what are progressive reading glasses without magnification on top?
Progressive reading glasses different from traditional reading glasses that only can correct near vision, provide a gradual change in lens power from the bottom to the top, allowing one to see clearly at any distance without needing to switch between multiple pairs of glasses.
Progressive lenses sometimes are called no-line bifocals because they don't have this visible bifocal line. While progressive lenses have a significantly more advanced multifocal design than bifocals or trifocals, it fits different demands of users.
The special function of these glasses is their smooth transition from distance vision at the top, intermediate vision in the middle, and near vision at the lower part of the lens. Because the top part of the lens has zero magnification allowing you to do any task without taking on and off your reading glasses, the middle part reduces its strength for computer use and the bottom part of the lens has the full strength of magnification for the nearest vision.
Why are progressive reading glasses so beneficial?
The progressive reading glasses offer many important benefits including providing clear vision at all distances and eliminating strange image jumps caused by bifocals and trifocals, where objects abruptly change in apparent position when eyes move across the visible lines in these lenses.
The reason why more and more people wear progressive reading glasses than the number who wear bifocal and trifocals combined is that wearing progressive ones is cosmetically appealing as there is no visible line. For those suffering from presbyopia, progressive lenses have significant visual and cosmetic benefits in comparison to traditional bifocals and trifocals.
How to choose a suitable type of reading glasses?
To choose the suitable type of progressive reading glasses, we need to know the types of progressive reading glasses first, and then we can make comparisons between those different kinds of glasses.
Let's first talk about FT28 bifocal reader lenses consisting of 28mm lines in the lenses below your eyes that separate two distinct fields, which allows users to watch TV from a distance and read near vision at the same time. The bottom reading power is typically chosen for 12-14 inches away, running from +1.00 to +3.00 in quarter diopter steps.
Provided it doesn’t require a distance prescription, it can be used anywhere even as bifocal sunglasses with a sunglass tint or photochromic lens option. But there is a visible line that some people feel is not cosmetically appealing and there are only 2 fields of vision with no in-between powers, which can be a sensation of image jump when looking up and down.
Another similar kind of FT28 computer bifocal lens provides some magnification at the top of the lens and full reading power at the bottom choose the combination of top or bottom powers which runs from +0.25 Top / +1.25 Bottom to +2.00 Top / +4.00 Bottom.
Then we can know about no-line bifocal progressive reader lenses that have no power at the top of the lens and reading at the bottom. The bottom reading power is typically chosen for 12-14 inches away so that reading powers run from +1.00 to +3.00 in quarter diopter steps.
It's necessary to make personal PD measurements to ensure that the progressive channel lines up appropriately below the eyes. Although they can provide intermediate magnification starting from the middle of the lenses and increasing to reading at the bottom, including wide intermediate and reading area, their reading area is not as wide as FT28 lined bifocal. The selection of line-free computer bifocal lenses is also equivalent to FT28 computer bifocal lenses.
Conclusion:
Due to nearsightedness, farsightedness, or astigmatism, progressive reading glasses without magnification on top are the perfect choice for virtually anyone who needs corrective lenses to see distant objects clearly, especially for anyone who prefers the latest products in multifocal vision correction and yearns for the most appealing eyeglasses possible with no old-fashioned lines in the lenses.
