are high index lenses necessary?
610627
High-index lenses are ideal for you if you are looking for eyeglasses that are lighter and thinner. Doctors might recommend this type of lens if you have a strong prescription for eyeglasses for farsightedness, astigmatism, or nearsightedness. ... The edges of the lens become thicker as the prescription gets stronger.
670103
Created with a level or precision and customization not previously possible, HD glasses are usually at least marginally better than conventional lenses. ... People who already achieve 20/20 vision with corrective lenses but have problems with glare or visual distinction are most likely to benefit from HD glasses.
918955
It is this diminishing capacity for adjustment, called presbyopia, that warrants reading glasses. The optical power of a reading glass lens with a focal length of 1 meter (about 39 inches) and is the equivalent of 1 diopter.
928768
If you already wear glasses, you'll need a separate prescription for contact lenses. Contact lenses have extra measurements such as diameter and base curve, for the perfect fit. Everyone's eyes are unique, so a contact lens prescription ensures you have lenses which are comfortable and fit well.
266291
One disadvantage of this progressive lens is that you'll need to have large frames. Otherwise, you can limit your near vision, so if you prefer small, less noticeable frames, premium progressive lenses are the better choice. Here are the benefits of standard progressive lenses: More affordable than premium lenses.
832209
For what it's worth, these are high-index lenses with “scratch resistant” coating. If you zoom in on the lenses in this photo you can get a good idea of just how bad it is: I really like the story of Warby Parker, and they have a lot of great frames. The problem is their lenses and that they just don't last.
867226
It's really your choice, depending on how sensitive you are to color distortion at the edges of lenses, how concerned you are with keeping the edges thin, and how much you're willing to pay. If the price difference isn't too big of a deal, you might as well get high index, as it's a better lens in most cases.
221628
Answer: As their names suggest, multifocal lenses enable you to have more than one prescription built into the lens so that you only need one pair of glasses for multiple uses. There are several kinds, including bifocal lenses, trifocal lenses and varifocal or progressive lenses.
1203581
HD glasses are a significant advancement in the world of eye health, but they are not miraculous. They are high-quality glasses that can often provide crisp vision. If your eye health is poor, they will generally not help you much more than a pair of conventional prescription glasses would.
52738
Multifocal contacts offer the best of both worlds: no glasses, along with good near and distance vision. ... But because of their rigid nature, GP multifocal contacts require some adaptation and are more comfortable if you condition your eyes by wearing the lenses every day.
791049
High Index 1.74 lenses are the thinnest, flattest, and most cosmetically appealing lens ever developed. These ultra thin lenses are nearly 50% thinner than plastic and 5% thinner than 1.67 high index lenses, offering you the ultimate in technology and cosmetics.
1389883
Portraits. A hugely important use for macro lenses is for portraits. When it comes to headshots and studio portraits, it's hard to beat the stunning sharpness of a macro lens. ... However, for full body portraits, you may be better off with a 50mm lens.
670439
5x optical magnification covers the most commonly used focal lengths, from wide-angle for taking in the whole scene to medium telephoto for flattering portraits. ... You can shoot still images without deteriorating the original image quality even if the optical zoom scale exceeds 10x magnification.
610486
The high-index 1.61 progressive polymer lens covers SPHs of -6.00/+3.00 or lower, CYLs of +/- 6.00 or lower, and an ADD of +3.00 or lower. The high-index 1.67 progressive polymer lens covers SPHs of -10.00/+8.00 or lower, CYLs of +/- 6.00 or lower, and an ADD of +3.00 or lower.
1270012
Traditional computer reading glasses contain single vision lenses. The entire lens is the strength that you need for comfortable reading at an intermediate computer distance. ... Like all progressive lenses, these are multifocal lenses, without lines, that transition between near, intermediate, and distance vision.
250550
Although most aspheric lenses are made from high-index materials, they are available in regular plastic, too. Other enhancements — including photochromic lens technology — are available in aspheric lenses as well. ... For this reason, anti-reflective coating is highly recommended for all aspheric lenses.
986997
No, wearing reading glasses shouldn't hurt your eyes, no matter your level of visual acuity. ... However, if you've never worn magnifying lenses before, keep in mind that you may experience some discomfort until your eyes adjust to them. Using corrective lenses won't damage your eyes, in general.