Types of Progressive Lenses
At the same time, there are different types of progressive lenses and they are standard PALs, short corridor PALs, computer PALs, and Reading PALs.
Standard PALs must fit your vision needs. They can be added to frames of your choice, but you need to ensure that the frames are the right width and height proportions to grant enough space for the gradient changes in the lens.
Short corridor PALs are made to fit into smaller frames so as to suit a wider range of eyewear styles.
Computer PALs are designed for computer users and other occupations that require strong intermediate and distance vision.
Reading PALs are designed for those who enjoy reading and they can opt for a pair of lenses with a larger close vision zone.
Advantages Of TR90 Frames
- Lightweight. The weight is about half the weight of the plate frame, which can reduce the burden on the bridge of the nose and ears, and it is also comfortable to wear for a long time.
- Bright colors. Compared with ordinary plastic frames, the color of TR90 frames is even better.
- Impact resistance. The TR90 frame is extremely flexible, and its good elasticity can effectively prevent damage to the eyes caused by impact during sports.
Regardless of whether it is a sheet frame or a TR90 frame, they have their own advantages. You can choose them according to your requirements, Importantly, it is comfortable to wear and good-looking.
Glasses Size - Bridge Width
The bridge width is the distance between two lenses, measured from the innermost layer of each lens. Finding the right bridge width will allow your sunglasses or glasses to be put properly on the bridge of your nose. The bridge of the nose is an essential element because even though the frame looks pretty attractive, it helps people see more clearly. The precise distance between the two lenses helps reduce the pressure on the eye, helping the nose, without putting too much pressure on the inside of the eye. The size of the eye and the size of the bridge is usually adjacent, sometimes separated by a square icon.
What Are Trifocal Glasses?
Trifocal glasses and no-line progressive lenses are multi-focal glasses, meaning that their lenses offer multiple correction fields. Whether you have been wearing multi-focal glasses for a while, or you have just begun to look at options for correcting vision after 40 years old, you may have heard the terms trifocal or progressive glasses.
Trifocal glasses have three different corrective lenses within one lens to offer you intermediate, distance, and near correction. Trifocal lenses look and perform similar to bifocal lenses, with an added viewing zone to help correct vision in the intermediate field, and two visible lines where the viewing zones change.
Types of Single Vision Lenses
Single vision lenses come in several different types including the 1.59 polycarbonate single vision, 1.57 mid-index single vision and polarized single vision.
1.59 polycarbonate single vision lenses are characterized by their durability and impact resistance. They often include an anti-scratch coating or anti-reflective coating. This lens is much lighter and thinner than a traditional plastic lens, and it blocks the sun’s harmful UV, offering maximum UV protection.
1.57 mid-index single vision lenses are thinner than regular plastic and moderately lighter and stronger. They come with an anti-scratch coating or anti-reflective coating. These lenses are an ideal option for people with relatively higher prescriptions. But they are thicker than the polycarbonate lenses.
Polarized single vision lenses are sunglasses that protect your eyes from light that bounces off smooth, highly reflective surfaces like asphalt, snow, and water. These lenses work by controlling certain light properties and limiting specific wavelengths. They boast a vertical filter that does not allow horizontal glare to pass through.
Are rimless glasses more expensive than full-frame glasses?
In terms of brand pricing, there are several kinds of prices. For example, the cost of production should be considered. In reality, we ignore the cost of designing products by designers, the cost of workers' wages, and the cost of instruments invested in the early stage. The rimless glasses price is determined according to the material, so if you choose the material of relatively good, the price will be more expensive. In general, the eyeglasses frames are from about 50 yuan to hundreds of yuan. Of course, sometimes the price of rimless glasses is about thousands of yuan. It all depends on the material and lens. You can choose according to your own financial conditions.
The keyhole bridge is different from an ordinary bridge.
The common bridge is designed to span the tip of the nose like a saddle. The two sides are evenly distributed along a wider area for a more even distribution of the weight of the frame and lens. A common bridge is the most effective way to shorten and reduce the shape of the nose. Especially when the upper margin of the frame is aligned with the eyebrow line or just below the eyebrow line, the overall structure of the face is more balanced. Both kinds of bridge designs have been widely used. Lighter colors, like clear crystal or pale yellow, will reduce the effect of keyhole bridges on the nose.
The keyhole design touches two sharp points of the nose bridge eliminating pressure from the top of the nose. This style makes a bold fashion statement suitable for both men and women. Athletic designs with comfortable details make this collection the first choice for everyday wear. If you’re ready for a new look, peruse our catalog of incredible selections with fashionable, lightweight and comfortable keyhole glasses.
