Benefits of Saddle Bridge Glasses.
The most common type of plastic bridge is called a saddle bridge. The style is very comfortable because it distributes the weight of the glasses over a larger area rather than focusing on smaller points, like adjustable nose pads. Saddles are known to cost less to repair because they have fewer moving parts and are possible to maintain their fitness. There is now a new saddle bridge-type transparent silicone cushion for a screw-type nose pad. It is made of medical-grade soft silicone. It can be bent and is very soft. To fit the curve of the nose, a plastic frame with a saddle or keyhole bridge can slip off the nose without proper support. Silicone is a soft and elastic material that can be formed according to the contour and shape of the nose.
Limitations of NXT lenses
NXT lenses made from Trivex can't be cut by means of traditional edge cutting ways, requiring certain edge grinders, which has caused some problems for retail stores. Therefore, now NXT lenses are more used in some glasses, like sunglasses, protective goggles, and so on.
What are keyhole glasses used for?
The keyhole distributes the weight of the glasses to one side of the nose rather than the top. It's a good choice for those with broad noses. Due to the lack of support at the top, the keyhole design will result in the frame being positioned lower than the saddle bridge frame. If you find that your saddle frame causes your eyes to be located just below the center of the lens area, you may try a wider frame or opt for a keyhole design.
About Polarized Sunglasses
Polarized sunglasses only absorb the reflected light of the object itself, presenting what is being seen, making the field of view clearer and thus reducing eye strain. In addition, the light through a bumpy road, water, and other places also can produce irregular diffuse light. The polarized lens can be this kind of optical filter, only absorbing the reflection of the object itself. Because of its high-efficiency filter layer, the UV blocking rate of the polarized sunglasses is 99%, which can effectively reduce UV damage to the eyes. And if you are driving, fishing, traveling, skiing, it is recommended to choose more powerful polarized sunglasses.
Glasses for heart-shaped faces
This type of face has a wide forehead, broad cheekbones, and a pointed chin. It is called a heart-shaped face. The upper part of the heart-shaped face is relatively wide and flat, and the lower part of the line is uniform and smooth. The facial line, the proportion is very soft, giving a person an intimate intuitive feeling. Wearing longer or rimless glasses for this face shape will make you look cute.
Refractive index of spectacle lens
It is generally believed that the higher the refractive index, the better the spectacle lens. Such spectacle lenses are relatively thin, and of course, the price is a bit expensive. When the refractive index increases, the direction of the light entering the lens will change greatly, the focus will move to the lens, the focal length will be smaller, and the diopter will become larger. In order to keep the diopter unchanged, it is necessary to reduce the curvature of the lens, that is, to reduce the curvature of the mirror surface, so that the thickness of the lens can be reduced. This is why the larger the refractive index, the thinner the lens is. Under the same premise of other things, the larger the refractive index, the thinner the lens, the lighter and more beautiful the lens, and the higher the price, but the larger the refractive index is not the better.
Plate glasses frame
Sheet glasses frames are generally made of high-tech plastic memory sheets. Its appearance is beautiful and fashionable, and its styles are diverse. Therefore, plank glasses are easier to match with clothes, which can show the personality and style of the wearer.
