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por SHINUEYEWEAR
red lenses glasses block close to 100% of both blue and green wavelengths. While many glasses block only blue light, recent studies have shown that...
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por SHINUEYEWEAR
When most people wear glasses, they are basically exposed to spherical mirrors (myopia or hyperopia) and cylindrical mirrors (astigmatism). In addi...
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por SHINUEYEWEAR
The light reflected from the object surface has been partially polarized to produce glare. The opposite effect of glare is to increase brightness, ...
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por SHINUEYEWEAR
1) What is the refractive index?The higher the refractive index of the material, the stronger the ability to refract the incident light. The higher...
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por SHINUEYEWEAR
With the development of science and technology, the types of glasses are rich and colorful. In recent years, a kind of glasses called progressive m...
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The definition of high astigmatism in textbooks is that when it reaches 75 degrees, it means high astigmatism, but in practice, when it reaches 150...
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The diameter of myopia spot lenses is 65-80, the most common is 70 or 75 diameter, and 80 diameter is relatively rare. The central thickness, refra...
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The so-called "lens distance" is defined as the distance between the inner surface of the lens and the apex of the cornea.The distance between lens...
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Knowledge of glasses industry1) The myopia lens is a concave lens, which is thin in the middle (cannot be thinner than 1.0mm). The thicker the edge...
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When the distant parallel light enters the refractive system of the human eye, it forms a focus behind the retina, which is called hyperopia. Use a...
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1. Do not take off and wear glasses frequently, which will cause frequent activity from the retina to the lens, which may easily cause the degree t...
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por SHINUEYEWEAR
My dear customers,Thank you so much for your interest in our SHINU brand online store. Our brand has been sold in the United States for nearly eigh...
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