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  • What is a photochromic lens?

    What is a photochromic lens?

    01, what is photochromic lens? Color-changing lenses (photochromic lenses) are lenses that change color in response to changes in UV intensity and temperature. Color-changing lenses are made by adding different photosensitizers (such as silver halide, silver barium acid,...
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  • How to check whether the blue light blocking lens is really blue light blocking?

    How to check whether the blue light blocking lens is really blue light blocking?

    The editor replied: Could it be the problem of the test pen? There are three ways to identify whether a blue light blocking lens has the function of blue light blocking: (1) Test method of spectrophotometer. This is a laboratory method, the equipment is expensive, heavy,...
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  • Lenses also have an expiration date, your lenses should be replaced

    Lenses also have an expiration date, your lenses should be replaced

    Same as tires, toothbrushes and batteries, lenses also have an expiration date. So, how long can the lenses last? Actually, lenses can be reasonably used for 12 months to 18 months. 1. Lens freshness During the use of optical lens, the surface will be worn to a certain extent. The resin lens can...
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  • Better lenses – PC space lenses, do you know?

    Better lenses – PC space lenses, do you know?

    1. What is a PC lens? PC is a good performance of thermoplastic engineering plastics, it is five engineering plastics inside the good transparency of the product, but also in recent years the rapid growth of general engineering plastics. At present, it is widely used in ...
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  • PC diaphragm used as lens to become mainstream? What are the benefits of PC lenses?

    PC diaphragm used as lens to become mainstream? What are the benefits of PC lenses?

    Polycarbonate (PC), also known as PC plastic; It is a polymer containing carbonate group in the molecular chain. According to the structure of ester group, it can be divided into aliphatic group, aromatic group, aliphatic group - aromatic group and other types. PC lens m...
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  • How do 3D glasses for 3D movies work? What are the classifications of 3D glasses?

    How do 3D glasses for 3D movies work? What are the classifications of 3D glasses?

    Why do you wear 3D glasses to watch 3D movies? When shooting the film need to wear 3 d glasses is in some ways, people see objects of the stereo effect, because the 3 d film with two cameras, and simulate human two eyes, let the eye is a camera picture, in the right eye ...
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  • Anti-blue light and anti-blue light lens

    Anti-blue light and anti-blue light lens

    We refer to the light that the human eye can see as visible light, that is, "red orange yellow green blue blue purple". According to most national standards, visible light in the wavelength range of 400-500 nm is called blue light, which is the shortest wavelength and th...
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  • How do 3D glasses create a three-dimensional effect?

    How do 3D glasses create a three-dimensional effect?

    How do 3D glasses create a three-dimensional effect? There are actually many types of 3D glasses, but the principle of creating a three-dimensional effect is the same. The reason why the human eye can feel the three-dimensional sense is because the left and right eyes o...
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  • Progressive lenses for vision over 40

    Progressive lenses for vision over 40

    Progressive lenses for vision over 40 After age 40, no one likes to advertise their age — especially when you start having trouble reading fine print. Thankfully, today’s progressive eyeglass lenses make it impossible for others to tell you’ve reached “bifocal age.” Progr...
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  • Prevent blue light glasses can protect an eye, still can prevent myopic? Attention! It’s not for everyone…

    Prevent blue light glasses can protect an eye, still can prevent myopic? Attention! It’s not for everyone…

    I'm sure you've heard of blue-blocking glasses, right? Many people need to work with mobile phones and computers for a long time, specially equipped with anti-blue light glasses; Many parents heard that this kind of glasses can prevent myopia, have prepared a pair for th...
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  • 4 Common Lens Coatings for Glasses

    4 Common Lens Coatings for Glasses

    Lens coatings are applied to eyeglass lenses to enhance the durability, performance and appearance of your glasses. This is true whether you wear single vision, bifocal or progressive lenses. Anti-Scratch Coating No eyeglass lenses — not even glass lenses — are 100% scratch-proof. However, lenses...
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  • The physics of 3D glasses

    The physics of 3D glasses

    3D glasses, also known as "stereoscopic glasses," are special glasses that can be used to view 3D images or images. Stereoscopic glasses are divided into many color types, more common is red blue and red blue. The idea is to allow both eyes to see only one of two images ...
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