How to know if lens is polarized?
Make use of LCD screens. Point the glasses horizontally at the LCD screen and then rotate them upward by 45 degrees clockwise. If it is a polarized lens, it will show a change in color deepening. If it does not change no matter how you rotate it, it is not a polarized lens. You can borrow another person's polarized lens or have previously worn a known true polarizer, and place it crossover with the new glasses you want to buy. At this time, you should see the object clearly from the crossover part with your eyes. Then cross the glasses vertically and horizontally, and at this point, the opposite object should not be visible from the intersection. If this condition is satisfied, it means that a true polarized lens is being tested.
Semi-Rimless Frame Glasses
Half-rim spectacle frames replace part of the spectacle frames with nylon wire, giving people the feeling of bottomless frames. It is lighter and looks more chic and firm. If you are a highly myopic friend, choose a pair of half-rim glasses, which can not only reduce the load on the bridge of your nose but also look more fashionable. Half-rim glasses are the first choice for men in the workplace, and they are more mature and stable.
What are NXT Lenses?
NXT lenses are made of Trivex materials. Trivex (Chinese name: Ethyl Carbamate Polymer) was invented by PPG in 2001.
Impact resistance is the main feature of the NXT lens. As a visual armor material originally used in the military field, Trivex has effective impact protection to the eye when it is most demanded. It is 10 times stronger than PC lenses in impact resistance and will last for life under normal use. It is the only explosion-proof safety lens on the market that can withstand external forces and turns.
Patented color injection technology :
Color representation is another important feature of NXT lenses. The biggest defect of the regular lens in dyeing is color aberration. The same color of the lens with different luminosity will produce different effects. The higher the refractive index, the serious the error. NXT lenses are a breakthrough in this respect. The patented color injection technology that infuses the color into the raw material gives the lens a natural color, ensuring that color aberrations are minimized and that they do not fade or change color over time or over long periods of use like other materials.
Abbe number and internal stress:
The Abbe number of NXT lenses made of Trivex is 43~45, which is close to CR39(58) and higher than PC lenses (29~32) and high folding lenses (32~41). At the same time, because the NXT lens is produced by the casting process, there is no stress in the finished lens, which further reduces the rainbow phenomenon, providing a guarantee for the clear visual effect and reducing eye fatigue.
The specific gravity of NXT lens is 1.11g/cm3, 16% lighter than CR39 (1.32g/cm3) and 10% lighter than PC tablet (1.22g/cm3). The Trivex 1.53NXT medium-fold lens is so light that it can float.
Choose the cost-effective glasses.
Choose your favorite glasses online. Open the shopping website, and select a store with high credibility. Choose your favorite glasses according to the style, lens, frame color, blue light blocking, radiation protection, and other factors, and then communicate with the customer service about the thickness of the lens and other specific details. If you see the frame is not suitable for yourself, you can communicate with customer service ahead of time to see whether you can buy the frame to send freight insurance. If it is not suitable, can we return it for a refund? To buy a store with a high reputation, you can look at the store's good comments and bad reviews. Talk to customer service. Sometimes there are hidden discounts.
How do blue light glasses work?
Using anti-blue light lens film reflection technology, the glasses reflect harmful blue light, so the surface of the lens reflects blue light, and the substrate absorption technology of the anti-blue light lens will not reflect blue light. Anti-blue light glasses mainly reflect harmful blue light by coating on the surface of the lens, or absorb harmful blue light by adding anti-blue light factor into the substrate of the lens, to realize the blocking of harmful blue light. The blue light intensity emitted by the mobile phone screen was effectively suppressed by the use of anti-blue light glasses, compared with a portable spectrometer.
How to drive at night with glasses?
Far-light is easy to cause blind spots for drivers of opposite vehicles, and it is possible to cause traffic accidents when driving in the cities. In the process of driving, if the driver encounters the situation that a high beam disrupts the line of sight, can turn the eye in the left or right direction, avoid light sources, and allow your eyes to gradually adapt to the other person's light source. If you can't see clearly, slow down or even pull over.
Choose the right color for your glasses.
Black, of course, is the classic color. For boys, wearing black frame glasses can promote the stereo sense of their facial features. Black is the most recognizable color. Black-rimmed glasses will make the outline of a boy's face clearer and make his appearance more handsome. Silver-framed glasses have all the features of metal-framed glasses. But compared to rose gold, silver is a bit more understatement, and it's very versatile and can be worn by guys with different skin tones. Those with darker skin tones can try deep burgundy shades, like popular brown and amber glass frames. Such a frame won't show too dull and won't show too abrupt. At the same time, it will be more harmonious to use a dark skin tone to foil.