It’s time for the sunglasses to shine again. But are your sunglasses truly stylish and suitable for you? Qualified sunglasses not only add points to your fashion, but also effectively protect your vision health. Even if the surface of poor quality sunglasses looks fashionable and beautiful, it is actually a serious damage to your vision health. Are your sunglasses of excellent quality? ? Won’t hurt your vision health? To this end, this platform has specially launched 7 major elements and 6 common senses that affect the quality of sunglasses for your reference.
7 factors that affect sunglasses
The light reflected from water or smooth surfaces is 10 to 12 times stronger than what is needed to see. When driving or participating in sports, glare can cause eye pain and distraction, which can be dangerous. To determine if your sunglasses are blocking glare, stand in front of a mirror with your sunglasses on. If you can see your eyes, the sunglasses aren’t deep enough to protect against glare.
2 visible light
In fine weather, to make your eyes feel comfortable, you should choose sunglasses that can block 75%-90% of visible light. Sunglasses that absorb at least 75% of visible light can protect your eyes from blue light (in the visible light category). People have a hard time looking at blue light and usually squint. Blue light can distort colors.
3 Visual effects
Sunglasses should allow you to see clearly and comfortably without pinching your head. But if the sunglasses are loose, it will affect the visual comfort. Mask-style or rim-shielded sunglasses can block UV light from the sides, top, and bottom of regular frames, but they can also increase optical distortion. To test visuals, put on your sunglasses and look at vertical edges or straight lines (like door frames or floor tiles). Move your head back and forth so that your eyes sweep across the lenses. If the straight line is found to be bent, it means that the lens is defective and distorts the vision
Lens tinting should be uniform, not small patches of varying shades of color. If a gradient lens is used, the lens color should gradually lighten from the top to the bottom, and the color should be uniform. If you’re buying sunglasses for driving, check the label to make sure they meet the requirements for identifying traffic signals. The shades of some sunglasses can distort the color of road signs, especially those with a special effect of blocking UV light. Such sunglasses should not be worn while driving.
5 polarized light
A polarizing filter is added to the glasses through a special lamination process. Both hard resin and high refractive index plastic lenses are polarized during the casting process. The polarizing film is added to the polycarbonate lens while it is still in a liquid state. Regular sunglasses reduce visible light, but are extremely weak against glare. Since their introduction in 1936, polarized lenses reduce glare by allowing only one direction of light to pass (vertical plane) while attracting light that is dispersed in all other directions. Polarized light has nothing to do with UV protection, but most polarized lenses contain chemicals that block UV rays. Because polarizers reduce glare, many golf, fishing and outdoor enthusiasts love them. Recommended for drivers and people who work in front of computer screens. Single vision, bifocal and progressive lenses all have polarizing filters. Some common filter colors include: light gray, 35-43% visible light penetration;
Medium gray, sometimes used with photochromic and mirror lenses; dark gray, 14-25% visible light penetration; hazel or tan, 27-29% visible light penetration; light tan, 18-27% visible light penetration Transparent; yellow, 68-71% visible light penetration;
Amber, providing a high-definition filter that blocks blue light; medium gray or brown, suitable for indoor or computer use, 60% visible light penetration.
6 Lens Coating
Lens coatings reflect high-density light and reduce glare, thereby reducing the amount of visible light that can reach the eye. To coat a lens, a thin layer of vaporous metal is added to the surface of the lens in a vacuum chamber. Coating colors include: silver, blue, reddish-brown or orange, most of which are just to make the glasses beautiful and fashionable, and do not have the function of protecting the eyes. Chromium is often used for metal coatings, but its wear resistance is not as good as that of high-performance titanium or quartz dielectric coatings. Lens coatings generally increase the color depth evenly throughout the sunglasses.
7 photochromic lenses
If you don’t want to correct your glasses and sunglasses frequently, wearing color-changing glasses is a compromise. In bright light, these photosensitive lenses automatically deepen the color within 30 seconds. Once outside, they automatically lighten again within 5 minutes.
In bright/low light conditions, the lenses will darken/brighten. Range: 25%-90% Time: 30-300 seconds 8) Tinted lenses
Gray: Allows you to identify true colors; common neutral colors; generally suitable; does not add contrast; suitable for golf, biking or running.
Green: Enables you to identify true colors; common neutral color; generally applicable; low contrast in low light conditions; reduces eye strain in bright light conditions.
Brown: more suitable for use in less sunny weather; can deepen the contrast; suitable for sports in glare environment, such as skiing, fishing or sailing.
Amber: Blocks blue light; increases brightness in cloudy, foggy conditions; sees colors as yellow or orange; high contrast; minimizes eye strain; suitable for athletes, pilots or skiers.
Yellow: Good depth vision and contrast in low light conditions; standard ski goggles in cloudy weather; suitable for target shooting.
Vermilion: Good depth vision in low light; great contrast to blue and green backgrounds; suitable for skiers or athletes.
Sunglasses use 6 common sense
1 Typically, 8-40% of the light can penetrate through sunglasses. Most people choose 15-25% of sunglasses. Outdoors, most color-changing glasses are in this range, but the light penetration of glasses varies from manufacturer to manufacturer. Darker color-changing glasses can transmit between 12% (outdoors) and 75% (indoors). Brands with lighter colors can penetrate 35% (outdoors) to 85% (indoors). To find glasses with the right depth of color and shade, users should try several brands.
2 Although color-changing glasses are suitable for everyday use, they are not suitable for sports in glare environments such as boating or skiing. Sunglasses’ shading and color depth are not a measure of UV protection. UV-absorbing chemicals are added to glass, plastic, or polycarbonate lenses. They are usually colorless, and even clear lenses are treated to block UV light.
3 Lenses vary in chromaticity and opacity. Sunglasses with light to moderate shade are suitable for everyday wear. In bright light conditions or outdoor sports, it is advisable to choose sunglasses with strong shading.
4 The opacity of progressive dichroic lenses decreases from top to bottom or from top to middle. It protects the eyes from glare when looking at the sky, while still seeing clearly what is below. Dual gradient lenses are dark at the top and bottom and light in the middle. They effectively reflect glare from water or snow, and we recommend not using them while driving, as they can blur the dashboard.
5 Prescription sunglasses can be tailored to suit your needs. In addition to adding UV-absorbing chemicals, sunglass lenses can be manufactured with dyed materials. In addition to dyed materials, manufacturers have developed light-filtering chemicals that absorb specific parts of the spectrum. They used a combination of dyeing and filtering substances to develop sunglasses dyes for specific sports, such as golf.
6 Tinted lenses with different light filtering functions. Most tinted lenses can block 70-90% of the light. Some tinted lenses can only filter certain wavelengths of visible light, but not others. Therefore, different dyes may deepen or change the color, affecting the contrast ratio. Some colors, such as pink, blue or purple, are purely decorative and are extremely poor at filtering light. The best way to choose tinted lenses is to hold your sunglasses with your arms outstretched and judge the color against a white background.
Quanzhou Kaidelai specializes in the operation and production of fashion sunglasses, branded watches and popular accessories. It has its own design and development team to create new products for customization and sales. The company integrates production and sales, one-stop procurement, and global product sales.