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how much do rx sunglasses cost?

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Do night driving glasses really work?

Yellow lenses reduce the amount of light entering your eye, reducing visibility. These darker colors block more blue light than yellow lenses. But they block more light from entering the eye, reducing visibility even more in low-light conditions. In fact, even yellow lenses reduce overall visible light to some extent because they block some blue light. This can be a good thing during the day, but not at night, when maximum visibility is key. Night driving glasses come in a variety of yellow and amber colors. The darkest lenses filter out the harshest light, but they filter out the largest amount of light, making it difficult to see in dim or dark conditions. Some people who wear night driving glasses say they can see better with them on. However, vision tests have shown that night driving glasses do not improve night vision, nor do they help drivers see pedestrians any faster than they would without glasses.


The arm length is an important part of the size of the glasses.

Spectacle frames are standard optical products. Just like people's clothes and shoes, they all have their own size. Usually, specs for the size of the glasses are on the inside of the temple, on the bridge of the nose, or on the label. In general, the frames of the glasses are marked with the width of the frames, the width of the bridge of the nose, and the length of the arm. For example, the inner side of the temple is labeled: 52口 18-135, indicating the lens width of 52mm, the width of the nose bridge of 18mm, and the arm length is 135mm.



Where did the glasses emoji come from?

The glasses emoji was approved as part of Unicode 6.0 under the name Glasses in 2010 and was added to Emoji 1.0 in 2015. Unlike the bespectacled 'nerd face', which is often used to suggest a cool sense of fashion. Just clicking on a few posts with the emoji is enough to make a person want to follow the eyeglasses fashion trend.


What Is Polycarbonate Lens?

Polycarbonate was invented in the 1970s for aerospace applications and is currently used for the helmet visors of astronauts and for space shuttle windshields.

Polycarbonate lenses were introduced in the early 1980s in response to a demand for lightweight, impact-resistance lenses. Since then, polycarbonate glasses have become standard for safety glasses, sports goggles, and children’s eyewear.

Polycarbonate glasses come with a lot of features such as thin and light and they provide 100% percent UV protection and are up to 10 times more impact-resistance than plastic pr glasses lenses.



The length of the temple is important.

The glasses should fit snugly over and behind the ears. If they clip behind the ear, mostly, the arm might be too short. The arms of your glasses should be straight back toward your ears, touching only the side of your head, just in front of your ears. If the temple bends too soon, it pushes the glasses under the nose, putting too much pressure on the bridge of the nose and causing a headache.


What can I do if the rimless glasses frame is broken?

It depends on the material of the frames. If it is a metal frame, the welding effect of 50 yuan is not worth looking forward to, because the high temperature will burn the welding point and the surrounding color. The electroplating will be destroyed, and it is difficult to accept the appearance. If the metal material is alloyed copper, it will quickly corrode and produce patina. If your frame is broken in a temple, you can fix it yourself with 502 glue or duct tape, but the look will definitely be affected. Or you can go to the optician shop to change the temple. But if all the temples are broken, it's impossible to repair.


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What Are High Index Lenses?

High index lenses are composed of a special plastic that is good at bending light. With this feature, high index lenses can be much thinner than standard lenses while having the same prescriptions.

So, polycarbonate lenses vs high index lenses, what are their differences?

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