What Are Blue Tinted Safety Glasses For?
Sat, May 07, 22 By : Koalaeye
Polycarbonate vs Plastic Lenses: Which One Is Better? From the above information, you may have learned some features of polycarbonate glasses and plastic lenses. So, do you know which one is better? Here are some a few differences between both lenses to determine which one is better. Polycarbonate lenses are more expensive than plastic glasses. Polycarbonate lenses are very resistant to tint compared with plastic lenses which accept tints. Polycarbonate glasses have inherent UV protection, while plastic lenses do not...

Polycarbonate vs Plastic Lenses: Which One Is Better?

From the above information, you may have learned some features of polycarbonate glasses and plastic lenses. So, do you know which one is better?

Here are some a few differences between both lenses to determine which one is better.

  • Polycarbonate lenses are more expensive than plastic glasses.
  • Polycarbonate lenses are very resistant to tint compared with plastic lenses which accept tints.
  • Polycarbonate glasses have inherent UV protection, while plastic lenses do not have.
  • Polycarbonate glasses have higher impact resistance and offer greater protection than plastic lenses.
  • Polycarbonate glasses are lighter than plastic glasses.
  • Plastic glasses have a higher optical clarity than polycarbonate lenses.

So, from the above part, you may have learned which one is better and you may have a decision of how to choose.


How to Adjust Glasses If They Pinch Your Nose

In some cases, glasses will pinch your nose, so you also need to adjust them, too. If the glasses frames are metal, you should simply widen the plastic nose pads using your thumbs until the frames fit comfortably. If the glasses frames are plastic, you should soak the arms of your glasses in warm water for 30-60 seconds, and gently apply upward and outward pressure on the end of the arms to get a more relaxed fit.

After that, your glasses will become more suitable.

Unfortunately, not all glasses can be adjusted by yourself at home. You can’t adjust some glasses which are based on the material of your glasses. For example, the glasses with the following material can’t be adjusted at home:

1. Aluminum alloy.
2. Memory plastic.
3. Titanium or memory titanium.

If your glasses are made of these materials, you can’t adjust them by yourself at home. If something goes worse, you need to buy a new pair of glasses. It is also risky to adjust the rimless or semi-rimless glasses by yourself at home.

As for how to tighten glasses or how to adjust glasses, you may have brief knowledge after reading this post. If your glasses are already broken or you want to get a pair of new glasses, you can try Koalaeye Optical, which is cheap and has a free shipping service.



What Are the Advantages of High-Index Lenses?

In this section, we will show you the advantages of high-index lenses.

  1. Thanks to the slim shape and narrow edges, high index lenses offer wearers the flexibility to choose from a wide array of fashion-forward frames. Their size means that they can be easily paired with sleek metal frames or incorporated into rimless eyewear for an attractive barely-there look.
  2. High index lenses are more comfortable for extended use because they are lighter than the traditional counterparts.
  3. High index lenses are available with many of the same options as traditional lenses. For example, they can be either single-vision or progressive.
  4. For users with strong prescriptions, high index lenses mean no bulky, bottle-glasses appearance. This can reduce the unwanted bug-eye look traditionally associated with very thick lenses.

However, there are some negative voices of high index lenses.


How do you find the right frame at Walmart?

There are different sizes of glasses frames, and the size suitable for each person is not the same. When choosing the glasses frame, you should pay attention to the size. You can compare the size of the glasses frame by querying it, or trying it on directly. There are also many shapes of spectacle frames. Usually, people with heart-shaped faces can choose each type of glasses frame. But for other face shapes, they need to foster strengths and circumflex weaknesses when choosing.

Under normal circumstances, it is recommended that dark skin choose black, tortoiseshell color, and other colors of some dark frames. For those with a yellowish complexion, avoid wearing yellow frames. You can match the glasses that shallow bright color fasten, so the glasses that come out to wear just can appear temperamental outstanding.



Metal frames are suitable for wearing.

For the eyeglass frames made of metal or alloy, after rigorous processing and gold plating, the color and luster of the surface reach a certain brightness. And it will be very beautiful to wear. Metal glasses have the benefits of solid, light, and beautiful shapes. The metal frame basically has a nose pad and the nose pad is a movable side that adapts to a variety of nose shapes. The end of the temple is covered with a plastic cover, which is beautiful and protects the skin.


The Cons of Progressive Lenses

In this section, we will show you the cons of progressive lenses. There are some problems with progressive lenses especially when walking up and downstairs. Since the reading correction is at the bottom, the stairs may appear closer than they actually are. But this problem can disappear if you have adapted to them.

In addition, all measurements must be exact when creating a pair of progressive glasses. The optical center of the lenses must be placed exactly in front of your pupils in order to the lenses to work correctly.

Also, some people may find that it is difficult to adapt the progressive lenses, and it may take a few days to adapt them.

These are the progressive glasses’ pros and cons. If you want to a pair of progressive glasses, Koalaeye glasses are recommended. Koalaeye glasses are stylish and come at a cheap price. Besides progressive glasses, Koalaeye Optical also provides other eyeglasses, such as blue light block glasses, polarized glasses, sunglasses, and so on. So, if you need a pair of progressive glasses, try Koalaeye glasses.



Design principle of progressive multifocal lens

For the same piece of the lens, the top is used to see far, the bottom is used to see close. The upper and lower degrees are different.

There is not a sudden change in the distance degree fixed above the lens to the near degree fixed below the lens, but a gradual transition between the two through gradual changes in refractive power, which has special benefits over common bifocals or trifocal lenses.

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