The discoloration principle of photochromic lenses
The fine grains of silver halide and copper oxide were melted into the glass melt of the lens blank material to produce the lens. When the lens is in the ultraviolet environment, the silver halide molecules will undergo a chemical reaction due to the ultraviolet radiation and decompose into silver ion particles and halogens. Because the silver particles are dark and absorb visible light, the lens gets darker. When the ultraviolet light is weakened or isolated, silver ions and halogens are recombined under the action of catalyst copper oxide to form silver halide, so the color of the lens gradually becomes lighter and transparent again. The discoloration mechanism of the resin lens is similar to that of the glass lens.
Benefits of wearing blue light blocking glasses
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Use blue light blocking glasses to relieve eye discomfort.
Excessive use of the device can cause computer vision syndrome or digital eye fatigue. Glasses with blue light filtering technology can enhance your concentration and reduce eye fatigue, thereby making your eyes feel less tired and improving work efficiency. Another way to reduce eye strain is to ensure that you stay away from the screen regularly.
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Sleep better with blue light blocking glasses
One of the more surprising effects of touching the screen is that it may have a negative effect on sleep patterns. Blue light has a high energy frequency, which can increase alertness and delay the body's release of melatonin, which helps induce sleep. Generally speaking, we should all avoid using Blu-ray devices one to two hours before going to bed. Anti-blue light glasses can reduce the impact of blue light, allowing you to use your device before going to bed and still have a good night's sleep. However, the best option is to put down the screen before going to bed.
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Reduce the possibility of AMD
Age-related macular degeneration (AMD) is the main cause of blindness. Anti-blue light lenses can help avoid or delay this situation by preventing blue light from affecting your eyes.
Computers, TVs, mobile phones, and tablets all emit blue light. Even with long-term exposure, the blue light emitted by these devices may not be enough to cause damage to the eyes or vision. However, further research is needed to confirm whether the blue light emitted from these devices is harmful. Experts are also uncertain whether blue light glasses can help symptoms associated with increased screen exposure. Ophthalmologists suggest that eye fatigue, headaches, and lack of sleep may be related to computer vision syndrome, rather than blue light exposure. For eye health, wearing blue light blocking glasses is not enough, we still have to develop good eye habits.
How to Choose Glasses for Heart Shaped Face?
Wearing a great pair of glasses can make you look more beautiful and fashionable. You want to find a pair of eyewear to correct your vision. Of course, they should be comfortable to wear.
Everyone has their unique style. So, finding a pair of great sunglasses is not an easy job. So, in this post, we will show you some suggestions to glasses for heart shaped faces.
Before proceeding with how to choose glasses for heart shaped face, you need to know whether you have a shaped face. Heart shaped face has some obvious features, such as a broad forehead; high, prominent cheekbones; a narrow jawline; and an angular chin. So, you can check whether you have these features.
However, if you do not know what face shape you have, you can click here to take a reference and have a check.
After checking the face shape you have, we will show you some glasses for heart shaped face.
How to buy plano lens?
You had better not buy off-the-shelf plano lens, buy by fixed matching, just like matching with myopic glasses. The price is much more expensive than the finished product. However, the quality of the finished glasses is not guaranteed, and the materials are also poor, which is not only not helpful to you, but harmful for a long time. There is no essential difference between degrees and workmanship technology for the lenses, what should choose is the brand lens film of the lens, and the transmittance of the lens, and the design technology of the lens, to buy a good lens (including smooth lens).
The function of eyeglasses cloth
Under a powerful microscope, the fibers of the cloth are more closely arranged than those of ordinary cloth, and the material itself is softer than ordinary cloth. That's because eyeglasses under the eye are almost always coated, with each standard lens having seven layers of different functions on the front and back surfaces, to extend lens life. It can thoroughly remove the stubborn stains left on the lens to make the picture clear. It can clean all kinds of glass, resin, and other materials of glasses, glass mirrors, and other mirror surfaces, remove stains, and grease absorption.
Armani glasses
As a sub-brand of luxury Armani, it is a high-end eyewear brand. It is representative of exquisite quality and noble luxury, and it pays attention to details and displays noble temperament. The handmade frame, superb craft, and workmanship make the charm of the Armani spectacle frame show in front of everyone. The medical environment-friendly silicone nose pad is designed according to the structure of the human nose bridge, which not only fits the nose more but is very comfortable. The prices of the Armani frame are basically around 1500 yuan.
Oval frame
Soft and smooth lines, implicit and introverted, reflect the gentle and quiet fair maiden style. It seems that the first pair of glasses worn by everyone who is nearsighted is oval, basically in high school. It seems to have a student era of green implicit, quiet lady. Even in middle age, there are a lot of people who will choose a lot of beautiful styles of oval frames. It seems that in their hearts, they all want to stay young forever.
