Is Uva The Same As Polarized? | KOALAEYE OPTICAL

Is Uva The Same As Polarized?

Vintage, Large Round Glasses

Round frames will be popular in 2021, but not only that, square and rectangular face shapes will work well. They can be mixed and matched with everything from business clothes to stylish sweaters and hats. If you're looking for a bolder look, oversized round frames are perfect for you. Smaller frames are more elegant, but you can opt for stylish colors.


How to Choose Glasses for Diamond Face Shape?

After learning the features of diamond face shape, you should know how to choose glasses for diamond face shape. Since there are a lot of pointed features on the face, the best option is to use eyeglasses that have soft rounded curves instead of harshly pointed angles. So, look at the following advice.

Cat eyeglasses: Cat eyeglasses would be a good choice for a diamond face shape. These glasses frames have rounded bottoms so as to hide away the pointed chin and the narrow jawline of the diamond.

Round eyeglasses: Round eyeglasses are also suitable for diamond face shape because the round curve of the glasses hides the sharpness of the pointed chin. Glasses with colored frames are appealing in the case of diamond face shape people.



Glasses Size - Lens Width

Lens width is the width of a lens, measured in millimeters, from one side of a lens to the other side of that lens. This is the most important measurement to make sure the frame fits your eyes.


What are the benefits of Silhouette?

The wonderful style suits both men and women. The glasses are made of strong, reliable, and not heavy metal. They adopt a screw-free design and high-quality process. The glasses are made of titanium alloy temples and are highly ergonomic. They are not heavy and elastic (only 1.8 grams in weight), independent of momentum changes and extreme gravity. The temples and nose pads are made of hypoallergenic titanium alloy. With no screws and hinges, they provide optimal safety in space conditions.



Best Frames For Heart-Shaped Faces

The heart-shaped face should be one of the favorite faces of Asians. It is characterized by a wide forehead, prominent cheekbones, and narrow and pointed lower jaw. This face shape is not balanced up and down in appearance, and the upper part is larger and more prominent than the lower part. Need to wear sunglasses with a wider bottom, which can increase the width of the lower half of the face. The lower mirror foot position also helps to improve this effect. Don't pick a special big style, normal size will do. Pilot sunglasses with a more angular top and bottom can be used to balance the roundness of the heart-shaped face and chin, increase the sense of facial lines, and visually make the face fuller. Retro black round sunglasses, coupled with a handsome choker, highlight the full street casual style. The recently popular 'inverted triangle sunglasses' are also very suitable for heart-shaped faces. The raised angle of the frame can correct the facial lines and add some angularity to the face. The inverted triangle sunglasses also have a retro temperament, and it feels that there is a mysterious demeanor hidden.


Eyeglasses Holder Strap Cord

It uses a reinforced anti-slip clamp ring. With an oversized metal clip and top-quality PU leather around the neck, this eyewear holder strap will provide stylish features. Unlike other eyewear cords, it will not make you look old. They are suitable for all types of glasses, from small frames to large frames. These eyewear chains and wires are suitable for both men and women, providing universal compatibility. They are suitable for reading glasses and magnifying glasses. You will have a stylish bag and cleaning cloth.


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Parameters of lens material selection

Abbe number

Since the refractive index of the lens material varies for the light of different wavelengths, and white light is made up of various colors of light of different wavelengths, the dispersion phenomenon occurs when the lens refracts white light. The dispersion coefficient is an important index to identify the sharpness of lens imaging, which is usually indicated by Abbe number (Abbe number = dispersion coefficient). The larger the Abbe number, the smaller the dispersion, and vice versa, the smaller the Abbe number, the larger the dispersion, and the worse the resolution of the image.

Impact resistance

Humans have been using glass lenses for about 300 years, and it was not until 1947 that the first resin lenses made of CR39 were produced. A big reason for using resin lenses is their safety, i.e. impact resistance. Only lenses that pass the Drop Ball Test are considered safe. Combining the above two parameters, we can compare different lenses.

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