Color: choose gray or brown
Gray or brown sunglasses can be worn in general outdoor environments. These two colors have good filterability and color perception, and can better distinguish various colors. Yellow, red, blue, green, etc. are not recommended, which will affect the resolution of the surrounding colors. Dark sunglasses, suitable for use in places where the sun is shining, such as the beach.
Size: can block the field of vision
At least the visual imaging area in front of the eye should be covered by the lens. If the sunglasses lens you choose is too small, you may see that there is no problem in front of you, but raise your eyes slightly to see the area above the front, and the glare will irritate your eyes. It is not necessary to choose oversized sunglasses. The glasses are too heavy to burden the nose, and the small face is easy to slip.
Radian: Don't be too big
Once the curvature of the lens exceeds 15 degrees, the refractive index of the lens receiving light will change, and the larger the mirror curvature, the greater the refractive index change. When wearing this kind of sunglasses, the things that are seen will be uneven, and it will be easy to wear for a long time. Eye fatigue, dryness, damage to vision.
UV index: between 96% and 98%
For the specific UV-filtering effect, pay attention to the UV index on the glasses tag. At present, the UV index of most sunglasses is between 96% and 98%, and the effect of dark lenses is better than that of light lenses.
1, the elderly: the best choice of gray lenses
It is best to choose gray lenses for the elderly with good eye health. Generally, it is better to use light to medium depth. Because gray is neutral, it can reduce the ratio of red-orange, yellow, green, blue, purple and yellow, and it has a cloudy feeling after wearing.
2, office workers: the lens color is not too deep
The color of the lens should not be too deep, generally at a medium depth. The dark lens affects the identification of traffic signals and command marks and is prone to danger on the way to and from work. Moreover, the dark lens makes the pupil naturally enlarge and the eye muscles are tight, which is not suitable for the office workers who have long-term eye fatigue.
3, children: it is best not to wear glasses
For children under 6 years old, it is best not to wear sunglasses. At this age, retinal dysplasia, long-term wearing sunglasses can lead to amblyopia. Parents cannot be lost because of smallness. If you are afraid of your child's eyes, you can take a cool hat shade. Or try to avoid places where you can go to glare.
4, driver: the best choice of polarized sunglasses
Driving outside for a long time, in addition to strong light and ultraviolet light, but also by the glare of the road surface, water surface, surrounding things, etc., you can choose a pair of polarized sunglasses, not only can block the glare, protect from ultraviolet rays, but also filter the glare emitted. To reduce visual fatigue and eye discomfort.
5, myopia: select the degree of color-changing glasses
It can be equipped with a pair of color-changing glasses with a degree. Under normal light, it is transparent myopia glasses. Under strong light, the color becomes darker, which can correct vision and block glare. It also has sunglasses with a degree for hyperopia. Or, wear contact lenses first, plus sunglasses.