Difference Between Blue Light Glasses And Regular Glasses
Studies have shown that blue light is present in many light sources in our lives, especially on screens like cell phones, computers, and televisions. The main health effect of blue light sources is the damage to the eyes. Long-term exposure to blue light sources may cause lesions in the eyes. The harm of blue light to human health can be prevented by corresponding new technology products. Among them, the anti-blue lens is one of them. So how to distinguish between blue-light-blocking glasses and ordinary glasses?
Where to Buy Glasses for Big Heads?
After learning which eyeglasses frames are suitable for big heads, you may ask where to buy them. To buy them, the online glasses store - Koalaeye Optical is recommended. It provides all kinds of glasses, eyeglasses and frames. What’s more, these glasses frames are cheap and stylish. You can also get the prescription glasses online and they will be mailed to you with great convenience.
What difference do mono-focal glasses and multi-focal glasses have?
A mono-focal lens is a lens with one focal point. Usually, the myopic far-sighted presbyopia that we see belongs to mono-focal glasses. There is only one diopter on one lens, and this is the single focal point. Multi-focal glasses are lenses that have multiple focal points, that is, multiple diopters. Both mono-focal glasses and multi-focal glasses are visual correction tools, but mono-focal glasses can meet basic vision needs, like fatigue relief, control of depth of diopters, and focus on different distances such as the need to see far and near.But because there are many different diopters on a multi-focal glasses lens, so the elderly can not only see far after wearing. When they see close distance, they do not need to take off glasses or wear reading glasses. Wearing multi-focal glasses is not easy to fatigue.
Which is better, Essilor lens or Zeiss lens?
1. Different high-density resin substrates. Essilor Diamond Crystal series 1.74 lenses use resin with a density of 1.46 as raw materials. The lens itself has higher hardness. Combined with Diamond Crystal series film layers, the lifespan of the lens is better improved. The outstanding abrasion resistance is obvious.
2. Different technical support. The greater the density of the lens, the harder the substrate. However, the larger the density of the lens under the same volume is heavier. Therefore, Zeiss has the best trade-off between density and component and selects high density on the basis of high refractive index and frivolity substrates.
3. Different Features. The anti-fog molecules on the two surfaces of the lens are activated by an anti-fog activator. Therefore, the fog differentiates into a thin layer that is invisible to the eyes, instead of forming a fog. Each spray of activator can last about a week. Zeiss resin lens guarantees up to 99.4% of the lens light transmittance, and the naked eye can no longer feel whether the lens is worn or not.
How to Choose Glasses for Diamond Face Shape?
Oval glasses: Oval glasses in the rimless or half-rim are complimenting glasses frames for diamond face shape. So, if you are looking for glasses for diamond face shape, try these.
Browline: The last glasses for diamond face shape we want to mention is the browline glasses. The double bridge that resembles aviator glasses seems one of the attractive choices of glasses for diamond face shape having a bit of detailing on browline with deep dark shades, half rim, tortoise-shell and other designs.
The Cons of Rimless Glasses
As there is no frame around your glasses lenses, the rimless glasses may be more likely to break. If you are not very careful with your glasses, you may have to replace them on a constant basis.
Rimless glasses are higher than other framed glasses because of the details that go into this style. In fact, the rimless style needs more work and time. So, making this kind of style is more time-consuming. So, rimless glasses are expensive than framed glasses.
From the above information, if you like rimless glasses, you can try them. Thus, you can buy them from Koalaeye Optical, which is an online store and provides all kinds of glasses, sunglasses, and frames. So, try Koalaeye glasses and the glasses will be mailed for you with your great convenience.
How to choose a spectacle frame
First of all, we must clarify what are the specific materials of the spectacle frames on the market. At present, the more commonly used glasses frame materials are sheet material, aluminum-magnesium alloy, natural wood, and bamboo materials. Of course, there are other materials such as titanium, TR90, and ULTEM.
Secondly, we have to make it clear that the texture brought by each different material is different, and each has its own advantages. For example, plastic glasses frames are made of sheet materials, which are characterized by easy processing and relatively lightweight. They are generally not easy to deform at room temperature. And the spectacle frame made of metal material is relatively strong, light, and beautiful. Therefore, to learn the advantages and disadvantages of each type of spectacle frame, we can meet our different needs according to each different material.
