First of all, you should know that it’s enough that the refractive index of the lens is suitable, not the higher the better. The 1.56, 1.61, 1.67, 1.71, and 1.74 on the lens are the refractive index ...
1. Permanently hurt the eyes Wearing sunglasses, the light becomes darker, so people’s pupils will increase, but because your sunglasses can’t block ultraviolet rays, it means that a large amount of ...
In a world where screens seem to be ever present, it’s important to take steps to protect your vision, even with something as simple as using your phone’s dark mode setting. But is dark mode better fo ...
Projection materials are divided into three categories: optical glass, optical crystal and optical plastic. Their optical characteristics are mainly determined by their transmittance and refractive in ...
Material: Made of high-tech plastic memory board. Composition: Most of the current sheet materials are acetate fiber, and a few high-end frames are propionate fiber. The acetate sheet is divided into ...
Get myopia to eat less high-sugar food, sugar is too much, will make the blood to produce a certain amount of acid, acid and salt in the body, especially with calcium phase and reduction in the blood ...
1. When buying contact lenses, you must pay attention to whether the brand has the registration certificate, production license and other relevant documents issued by the State Food and Drug Administr ...
For myopic friends, glasses are a burden when doing sports, so do people need to wear myopic glasses when doing sports? Many people have different answers to this question. Some people say that you m ...
1.What is the difference between night vision glasses and polarizing glasses 1. Different principles Polarizer is made according to the polarization principle of light, which disperses unwanted ligh ...
Misunderstanding 4: The more the myopia glasses are changed, the higher the degree In addition to genetics, excessive use of eyes and unscientific use of eyes. The degree of myopia in the development ...
5 signs your glasses don’t fit You’ve found what appears to be the perfect set of eyeglass frames to match your unique style, but the fit falls flat. The size and shape of your eyewear does matter ...
In recent years, with the gradual increase of adolescents’myopia, children’s glasses have also been paid more and more attention. So how to choose a frame for children? First of all, color and "good-l ...
New style folding sunglasses, convenient and stylish and easy to carry，Both feet and frame can be folded, PC frame + PC lens. The lens can replace Polaroid sunglasses ...
Anti-blue-ray glasses are glasses that prevent blue light from stimulating the eye.Special anti-blue light glasses can effectively isolate ultraviolet light from radiation and can filter blue light, s ...
1. May cause damage to the eye surface. When you are using a mobile phone, too much attention will reduce the number of blinks per minute. In addition, the brightness of the mobile phone screen after ...
Is amblyopia therapeutic instrument useful? Amblyopia refers to the absence of obvious organic lesions or organic changes and refractive abnormalities in the eyes. Generally, people over 4 years old ...
Misunderstanding 1: The child's poor eyesight is myopia There are also two types of low vision: physiological and pathological. 95% of the visual acuity of preschool children is not myopia but caused ...
Hello Friend , During COVID-19, our China still can attend Exhibition Time is around October and address is in city. At show, you can see many suppliers and physical samples Very good chance for y ...
Hello friend, Today I introduce new material: memoery metal for you It is kind of titanium, flexible and superlight. People wear them very comfortably. Also Price is normal metal price. It is real ...
In the hot summer, whether going for a self-driving outing, going on a beach holiday, hiking in the wild, or going out shopping, fashionable hipsters must have a fashionable sunglasses. However, in th ...
Do you know how your glasses can prevent fog?Foogging of glasses is very troublesome for people who wear glasses, and today we have some ways to solve the problem of glasses fog. 1, anti-fog liquid, ...
Personalized customization has become a habit of quality life and high-end people. Personally customizing our own products can not only get the greatest product experience, but also help us. Yichao ha ...
Lens material classification Glass lenses include optical glass lenses and high refractive index lenses. It has high hardness and good wear resistance. Generally, its quality and various parameters wi ...
Precautions for purchasing 3D glasses, how to select 3D glasses? 1.Look at the variety and style There are a variety of 3D glasses on the market, with uneven quality and prices ranging from a few pi ...
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