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With the increase of glasses demand, the style of the frame is also multifarious, sedate black square, exaggerated color round frame, shining phnom penh big frame, there are all kinds of grotesque shape...... So, for the selection of frames, we should pay attention to wh...Read more »
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With respect to spectacle frame itself, it is basically three factors: material quality, craft detail and design. Material: mainly divided into metal, plastic and other materials. The best metal material is titanium, pure titanium, B titanium or titanium alloy. Titanium...Read more »
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Why do we wear glasses after a period of time will feel less clear and bright when first wearing? In addition to natural aging, lenses will also be worn and scratched in the process of daily use, so how do these scratches come about? Today, let's talk about what scr...Read more »
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Intrinsic quality factors of resin lenses: 1. Base material quality The substrate quality determines the durability of the lens and the reliability of the coating. Good substrate clear and bright, long use time and not easy to yellow; And some lenses use time is not lo...Read more »
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From single focus lens, bifocal lens and now "progressive multi-focus lens", "progressive multi-focus lens" has been widely used in adult anti-fatigue lens, middle-aged and elderly progressive lens and adolescent myopia control lens. So, do you really know anything ...Read more »
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So let’s just take a quick look at what blue light is. Short-wave blue light is relatively high-energy light with a wavelength between 400nm and 480nm. The blue light in this wavelength will increase the amount of toxin in the macular area of the eye, seriously threatening our fundus health...Read more »
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A sphere is the whole surface with one curvature, just like cutting from a sphere, and a non-sphere is a different curvature, like maybe cutting from an ellipse. The purpose of the spherical aberration is to solve the problem of spherical aberration, because the spherical surface has different fo...Read more »
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1.base material quality. The substrate quality determines the durability of the lens and the reliability of the coating. Good substrate clear and bright, long use time and not easy to yellow; And some lenses do not take long to turn yellow, and even the coating falls off. Good lens without a scra...Read more »
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The lens is yellow Reduce visual definition, increased the burden of the eyeball, myopia degree deepened. There are scratches on the lens Influence lens refraction effect and optical correction performance, lose the role of improving vision. Degree is not Myopic degree early and before the myopic...Read more »
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Lens, I believe that you are not unfamiliar with the industry, every day in the mouth, hand have “lens”. Speaking of lens parameters, many people are also handy, refractive index, specific gravity, film, Abbe number and so on. But do you really understand the lens production process? ...Read more »
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Knowledge of the lens First, lens optics Corrective lenses: the main purpose of the application of glasses is to correct the refractive error of the human eye and increase vision. Glasses with such a function are called “corrective glasses”. Corrective glasses are usually a single len...Read more »
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Tang Dynasty poet Jia Dao has a famous poem: ten years to sharpen a sword, frost blade has not tried. The development of smart glasses has undergone exactly a decade of change and iteration. It’s been a tumultuous decade for the industry, and it’s been a dramatic one on film. Google G...Read more »
