What does D Frame mean? | KOALAEYE OPTICAL

What does D Frame mean?

What is the best lens material?

Crown glass was first used to make lenses. The glass melt was blown into a crown, or hollow sphere, and then reheated in the center of a rapidly rotating plate, which was then unrolled and flattened by centrifugal force. Flat and thin edges are cut into suitable shapes to make window panes. The circular bulge in the middle is the prototype of the lens. The glass material used to make lenses was originally colorless transparent glass with a refractive index of 1.523. Other substances were added to the lens to improve its ability to absorb ultraviolet light.


Features of Beta titanium glasses frame

Beta titanium has better strength, fatigue resistance, and environmental corrosion resistance than pure titanium and other titanium alloys. The shape plasticity is very good, which can be made into wire and sheet, more lightweight. They are used to make glasses and can get more shapes and styles. It's the material for a new generation of glasses. Customers with higher requirements for style and weight can completely choose beta-titanium glasses. Because β titanium processing technology is higher than pure titanium, usually only large factories and brands will produce, and the price is higher than pure titanium glasses.



Tortoiseshell is the important material of the frame.

The old metal frames used to be made of stainless steel or other alloys, and most of them have been phased out. The more popular modern metal frame is titanium metal frame, pure titanium, beta-titanium, memory titanium, and so on. In addition to being relatively light, it is resistant to corrosion and does not deform easily, especially used for the production of glasses or glasses frames. Because the color like amber gives a person a warm and delicate, luxurious and elegant feeling, so tortoiseshell glasses in the eyewear industry are a best-selling type of glasses.


How to choose blue light blocking glasses?

Nowadays, electronic products such as mobile phones and computers have become indispensable tools in our lives. While these high-tech products bring us convenience and fun, they also bring symptoms such as eye fatigue and myopia. Subsequently, blue light blocking glasses have also received everyone's attention. Anti-blue glasses are only suitable for people who use electronic products for a long time, not for people who are visually fatigued. Exposure to such unnaturally strong blue light for a long time every day, especially for teenagers and children, needs to pay more attention to the prevention of blue light. So, how to choose suitable blue light blocking glasses for kids?

Anti-blue light is necessary, but not all blue light can be filtered out, because blue light will interfere with the body's melatonin secretion after being over-filtered, thereby affecting sleep. Therefore, when choosing blue light blocking glasses, you should choose appropriately according to your own eyes.

For how to choose anti-blue glasses, consumers can distinguish from the color of the lenses. Generally speaking, a lens with a yellow color will have the effect of blocking blue light. But too dark lenses will affect the contrast sensitivity. Therefore, it is recommended that consumers choose moderately. In addition, consumers should also pay attention to whether the glasses products (lenses, frames) have conformity marks, etc. It is best to choose professional and well-known glasses shops to match glasses.



Where to Buy Glasses for Big Heads?

After learning which eyeglasses frames are suitable for big heads, you may ask where to buy them. To buy them, the online glasses store - Koalaeye Optical is recommended. It provides all kinds of glasses, eyeglasses and frames. What’s more, these glasses frames are cheap and stylish. You can also get the prescription glasses online and they will be mailed to you with great convenience.


What Do Trifocal Lenses Do?

Trifocal glasses can provide correction for some eye conditions including presbyopia and cataracts. Presbyopia often occurs in people who are between the age of 40 and 60. People’s eyesight starts to deteriorate and they are unable to focus at near. Wearing trifocal glasses can help correct blurred vision, eye strain, and headaches. The trifocal intraocular lens placed during cataract surgery can also resolve cataracts.

From above, you have learned some information about trifocal lenses. But what are the pros and cons of trifocal lenses? So, in the following section, we will focus on the advantages and disadvantages of trifocal glasses.


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INMIX Driving Glasses

Inmix has tried many functional innovations, like an ultralight frame that weighs only seven grams and can float on water, a blue lens that blocks radiation from computer and mobile phone screens, and an allergy nose pad. Inmix Glass is an attempt to distance itself from its competitors with a strong visual style. The performance of Inmix glasses is beyond its young brand positioning. The brand competitiveness of the old brand is not lost at all. Opening the affordable era of glasses, it truly realizes the ecological chain from factory to consumer, and gives consumers the most cost-effective high-quality glasses. Parity and quality make the sales volume double every year, and the sales volume in 2015 is more than the sum of the previous years.

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