Design principle of aspheric lens
Early optical lenses use spherical lenses. Because the glasses were small round frames, the problem of lens edge aberration was not paid attention to. It wasn't until large frames became popular that the problem became apparent. For the spherical lenses, aberration cannot be corrected with the combined lens. Only a few variables of the lens can be found to reduce aberration and improve clarity. Aspheric lenses are designed to reduce the aberration of optical correction lenses and to make lenses flatter and reduce lens magnification. We can get clearer, thinner, lighter-quality lenses. Thus, aspheric lenses are used to reduce aberration and astigmatism to a minimum, close to the natural vision of the naked eye. The spherical aberration can be reduced by changing the curvature of the edge. The refraction in the central region is high and decreases evenly toward the edges.
Why are rimless glasses so expensive?
Rimless glasses are the design vantage point in the frame of glasses. The structure of rimless glasses requires many higher physical features (flexibility, surface texture, etc.) and machining accuracy than TR, PEI, and other materials. In order to ensure comfortable wear, the common materials are very exquisite. And for processing technology, the frame is the most difficult. It's not just grinding, it's a full polishing, and it's perforating. This is the technical demand and the most time-consuming.
How Do Progressive Lenses Work?
So, how do progressive glasses work? Progressive lenses allow you to see at all distances with one pair of glasses. They start with your distance prescriptions at the top of the lens and increase as you move toward the bottom of the lens. You can move your head position to allow you to focus through different areas of the lens.
Move your head upwards to see something in the distance, and hold it straight for intermediate or arm’s length vision and down for near vision for objects that are close up. Apart from the aesthetic improvement of the lens without the line segments, progressive lenses avoid the visual discontinuity or image-jump when your eyes shift from one zone to the other in non-progressive multifocals.
Men’s clear glasses frames
Some men like the classic eyewear style like aviator, wayfarer, or rectangle eyeglasses. If you would like to refresh your daily look, the clear glasses frames with the unobtrusive appeal will deserve your shoot. The clear acetate eyeglasses frame with a round shape makes these clear round glasses a good choice for men.
Loho Driving Glasses
Loho pioneered a new M2C model in the glasses industry. Depending on flexible supply chain management, it predicts that the market trend will break the industry monopoly, directly connects with the sales terminal from the factory, removes the intermediate cost, and occupies the absolute cost-performance advantage. Loho adopts omni-channel data operation to carry out the new retail operations. It uses a comprehensive new retail operation channel digital operation. Loho cooperates with world-renowned designers to keep up with the fashion trend, giving glasses a more cost-effective brand experience, so that everyone can enjoy equal fashion.
Where to Buy Blue Light Glasses?
From the above part, you have learned the advantages of blue light glasses. Hence, you may ask where I can get a pair of blue light glasses. Thus, Koalaeye Optical would be a good choice since it provides various blue light blocking glasses with beautiful and fashionable frames. Besides the blue light glasses, Koalaeye Optical also provides other eyeglasses and sunglasses. You can choose the satisfied one from here.
How To Choose Better Night Driving Glasses?
Driving at night has a high accident rate because of poor visibility, blinding headlights, and fatigue. Now the market exists a few main glasses: sunglasses polarizing lenses, Glasses that use or mimic the first generation of patented technology. So how do you compare the options between driving and wearing glasses?
Night driving lens is relatively special compared with daily driving lens, not only to prevent strong light and see the road more clearly. According to the national motor vehicle driver special glasses standards, QBT 2659-2004 daily light transmittance should be more than 8%, night light transmittance should be more than 75%. Be sure to consult customer service. Ask about the situation. Note that a pair of polarized sunglasses are not suitable for use at night, and the light transmittance must reach the national safety standards.
