Standard vs Premium Progressive Lenses: What Are Their Differences
In the above part, we have introduced some basic information about standard and premium progressive lenses. So, what are their differences? In this section, we will show them.
Compared with premium progressive lenses, standard progressive lenses require large frames. Otherwise, you will limit your near vision. On the contrary, if you prefer small and less noticeable frames, premium progressive lenses are the better choice.
Compared with premium progressive lenses, standard progressive lenses are cheaper. For most people, standard lenses are affordable.
Compared with premium progressive lenses, standard progressive lenses are suitable for most people including children.
Premium progressive lenses are customized to your eyes and offer a wider viewing area than standard lenses.
What are bendable glasses called?
Bendable frames, or memory metal frames, are metal frames that can be twisted, bent, and shattered without breaking or losing their original shape. It's made of a kind of smart metal that has a memory. Its microstructure has two relatively stable states. At high temperatures, the alloy can be changed into any shape you want. Memory metals are mainly nickel-titanium alloy and other materials. The structure of these alloys varies with temperature in the solid-state, the shapes of these alloys can be changed as needed, and will automatically return to their original shape at a given temperature. One unique aspect is its ability to return to its original shape, although the frame has been twisted, bent, or crushed. They are lighter and more durable than traditional metal frames. The bendable frames are made of composite metal alloys for bending properties. These lenses can be twisted and bent, and when they are released, they return to their original shape.
The characteristics of metal material
The material of metal glasses frame chooses some kind of metal material or alloy to make mostly. Most of the copper alloys are treated as the base material and then have surface treatment processing. Then there is the recent rise of pure titanium frames and those made of memory alloy. Metal frames are usually equipped with nose pads, which are movable to accommodate a variety of nasal shapes. The end of the temple is often covered with a plastic cover, not only beautiful but also to protect the temple and skin.
How To Choose Better Night Driving Glasses?
You should select light alloy material and polymer material with memory, collision resistance, and low friction coefficient characteristics. It can effectively prevent the damage to the eyes and face caused by the friction of the broken lens frame during use. Because of its specific molecular structure, the chemical resistance is good. In the high-temperature environment. it is not easy to deform and can withstand 350 degrees in a short time of high temperature, not easy to melt and combustion. The glasses made of this material are light and strong, and the ears will not be uncomfortable because of wearing the glasses for a long time.
What to consider when buying eyeglasses?
You should think about that if the popular trend complies with your need for lens optics, the material, and its price, the famous brand. Check that if the producers have a professional cognition. The current frame is made of titanium, tungsten plate, carbon, metal, plastic, tortoiseshell, plastic, etc. Titanium is one of the best and most stable materials. The frames of other materials are easy to be corroded, discolored, worn, and deformed. No matter what kind of material you choose, it must be stable, safe, reliable, skin-friendly, light, strong, and non-deformable.
Are night driving glasses good?
The color of night driving glasses can be selected from yellow to amber. Yellow lenses will reduce the light entering the eyes and reduce visibility. At night, this can be harmful. The lens filters out a lot of glare, but also filters out other visible light, making it difficult to see objects in dim or dark conditions.
Some people who wear night driving glasses say that they are more capable of seeing things at night. However, related test studies have shown that driving glasses at night does not improve night vision, nor can it help drivers see pedestrians faster than when they are not wearing glasses. A small study in 2019 showed that night driving glasses actually slow down the visual reflex by a fraction of a second, making night vision worse. So don't try to improve the safety of driving at night by wearing driving glasses with this kind of yellow lenses.
Does wearing sunglasses at night help driving? Like night driving glasses, sunglasses will reduce the amount of light entering the eyes, which makes them unsuitable for night driving and potentially dangerous.
Choose rectangular glasses based on the shape of your face.
If you belong to the oval face, do not choose the too large or angular glasses frame. And do not choose long or square ones. It will be easy to elongate the face and affect the overall appearance. The shape of a round face is the opposite of a square face, so the buying principle of the glasses is basically the opposite of a square face. You need a more angular one to improve the shape of the face, but you need a square face (elongate) principle, that is, use a lower height, higher temple position of the frame.