What is an aspheric lens?
Strictly speaking, any lens with a refractive surface that is not a sphere is an aspheric lens, including ordinary astigmatism lens, progressive multi-focal lens, Aspheric apical lens, etc. But customarily, our daily aspheric lens refers to the Aspheric apical lens. From the center of the lens to the periphery, the radius of curvature increases (the surface of the lens flattens out).
Rimless Glasses
This kind of glasses does not have a frame to wrap the eyeglass ring, only the metal nose pad, and temples, and the lens is fixed after being punched, which is relatively lighter. This kind of glasses is lighter and more fashionable and is the first choice for ladies in the workplace.
Disadvantages of Plastic Frames
The disadvantage of injection molding material is that most of them have surface spray paint processing. They are not wear-resistant, easy to fade, easy to peel off the paint layer. PC material comfort is poor, and durability is not good. The frames cannot be changed to suit different face shapes. Because of its good elasticity, TR material can not be changed, which means that poorly made lenses are easy to fit into the frame. Plate material is hard, if the change is not appropriate, it will be not comfortable. Acidic material can not match the lens made of PC material, which will cause the lens to crack.
Round face with square glasses
A round face is a relatively round type. This type of face looks very round but lacks a little beauty. The biggest feature of a round face is that it is softer, and the contours and features of the face will look gentle. However, it lacks a little tough line, so it is most suitable to choose square glasses for a round face. It can add a little small line to your round face and it will look more beautiful.
What are the colors of the fishing polarizer?
Amber, yellow, or orange lenses are very suitable for wearing on cloudy days. They can have a very clear vision, but they are not suitable for use on sunny days. Gray or dark green lenses can maintain the most natural original color when viewing objects, which is a good choice. Sunglasses are not only required to be worn in summer but they must also be used throughout the year. Wear it on sunny days and also on cloudy days. Don't think that the sun is not strong on cloudy days and the weather is not hot, so you don't need to wear sunglasses. The harmful ultraviolet rays will harm your eyes unknowingly. Therefore, even if it is a cloudy day with thin clouds, you must still wear sunglasses to protect your eyes.
How to adapt to progressive lenses?
People who are prone to motion sickness or have inner ear diseases may suffer dizziness, nausea, vomiting, and other symptoms due to their inability to tolerate the slight deformation of the visual objects, so they need to pay more attention when wearing them. For people who have not worn reading glasses before, it is not recommended to wear graded multi-focus glasses directly because their eyes will not be able to adapt quickly.
When do you need sunglasses?
The eye skin is more fragile than other parts. Long-time exposure to ultraviolet light will not only stimulate the eye to make it aging but may damage tissues like the cornea, leading to a series of eye diseases.? For more effective eye protection, sunglasses are a better choice.? Dazzling sunshine will make the eyes uncomfortable, affecting the clarity of the objects. Wearing sunglasses will greatly increase comfort.? When the sun is strong, when you go out, take the appropriate way to protect your eyes from the sun.? For example, wearing sunglasses can absorb ultraviolet and infrared rays, reducing sun damage to the eyes.?If you are driving in the direction of the sun, wearing sunglasses can not only protect your eyes from UV radiation but help the driver better observe the situation ahead, which is conducive to safe driving.
