The lenses of prescription glasses
Common materials for lenses include glass, resin, and PC. The glass is fragile and heavy, and few people wear it anymore. PC film is tough and not fragile, but it is not resistant to high temperature and the surface is easily scratched. The most common type of lens on the market today is the resin lens, which is light in weight, hard to break, and reasonable in price. At present, it is generally recommended that you choose resin sheets, and it is recommended that people with ultra-high myopia choose glass sheets.
Generally, lenses can be divided into spherical and aspherical surfaces according to different curvature designs. When choosing, refer to the degree of the eye. For people with lower degrees, There are fewer differences between the two shapes. For people with moderate to high myopia, aspherical lenses will have better imaging effects and clearer vision.
When choosing a lens, a parameter that is often mentioned is the refractive index. Common refractive indexes are 1.56, 1.60, 1.67, and 1.74. With the same degree, the higher the refractive index, the thinner the lens.
Do You Need Plano Glasses?
Many people choose to wear plano glasses or glasses without prescription just for cosmetic reasons, without any need for vision correction. Normally, glasses frames without a prescription come with a pair of cheap plastic demo lenses.
Since there is no corrective effect on plano glasses, some people choose wear plano glasses for protecting their eyes from dust, and other flying objects. In addition, plano lenses come in a variety of protective coatings - anti-glare, scratch-resistant, blue light coating, UV coating to provide all around protection to the eyes.
So, if you want to protect your eyes from some unexpected damage, you can choose to wear the plano glasses and they would not bring any damage to your eyes.
Pure titanium
When the titanium purity reached more than 99% of the titanium metal materials, they can be called pure titanium glasses. Many people may not know what pure titanium is. In reality, many famous brand glasses are made of this material. The frames made of pure titanium have the benefits of high melting point, light material, strong resistance to corrosion, and strong electroplating, to ensure the two important properties of beauty and durability spectacle frames.
If you need reading glasses when using a computer, you may want to choose a lower reading glasses power. This is because most people view their screen from a greater distance from their eyes than when they are reading a book or a magazine.
However, if you need reading glasses for looking at something very close or very small, you may need a pair of stronger power glasses.
In most cases, when two reading glasses’ powers seem equally suitable, choose the glasses with the lower power. Picking reading glasses that are too string typically will cause more discomfort problems than reading glasses that are a little too weak.
Disadvantages of polarized sunglasses
Polarized sunglasses have many benefits. However, in some cases, non-polarized lenses are a safer choice. On cloudy days, drivers find that non-polarized sunglasses are better than polarized sunglasses due to the lack of glare and extreme sunlight.
Driving with polarized lenses after snowing can be dangerous for drivers. As the glare of polarized sunglasses is blocked, ice or snow on the road will not be visible. In this case, the advantages of polarized sunglasses will become the disadvantages that may cause accidents.
In addition, when driving along a dark road with few street lights at night, wearing polarized lenses will make it harder to see the road conditions because they dim the available light better than non-polarized glasses. Of course, in low-light conditions, it is best to avoid wearing sunglasses completely while driving.
The most significant disadvantage of polarized sunglasses is that they do not perform well on digital screens and displays. They can cause the images and information on the LCD screen to blur or disappear at certain angles. Don’t wear polarized sunglasses to use these devices while driving.
Why do people like wearing rimless glasses?
The simple atmosphere and extreme minimalism can highlight the characteristics of the character. They belong to the business type glasses. They are suitable for professors, principals, and other leaders. A minimalist style will keep them from going wrong in the work environment. Secondly, they can highlight professional temperament. Because rimless glasses style is more diverse, and stylish, with a rich color difference, they are popular for many people.
Eyeglass frames are stylish equipment.
Since last year, the fashion industry has been experiencing a wave of glasses.Some fashion ICONS, mostly celebrities, are pretending to be short-sighted and wearing clear glasses. Recently, it is not difficult to find people wearing retro style when walking on the road, and retro style has become a popular style little by little. But what you might not notice is that clear glasses are showing off. In reality, clear glasses set off a wave of popularity in Euramerican already. Why did clear glasses become a trend?
Frame enthusiasts may own a dozen pairs of glasses with different colors and shapes. Different clothes go with different frames. It's the same with different hats and bags. The black frame is mature, so it can be used to attend some more sedate occasions. Encrusted diamond frame is in fashion, usually used when shopping, very fashionable. The round frame is the important prop that dresses up to be lovely.
