How to choose sunglasses

Sunglasses block UV rays. How to buy? Because the lens is coated with a special film, and poor quality sunglasses can't block UV rays. Also caused a serious drop in the transmittance of the lenses, make the pupil bigger. So, let's share how to choose sunglasses.
Glasses quality
1.     UV Protection
The eyes excessive exposure to ultraviolet light may cause cataracts, burns, and even cancer. It is important to choose a pair of sunglasses with high UV protection. Good sunglasses, at least to block 99% of UVB rays and 95% of UVA rays. If there is no label on the glasses telling you how much UV protection this pair of glasses is, don't buy it.
2.     Color
Through the filtering of the color of the sunglasses, the color contrast seen by the eyes is different. If you choose colored lenses, it is not impossible, but you must get a clear traffic light when you drive.
l  Gray lenses can be very effective in reducing the intensity of light without affecting the contrast of the color.
l  Brown glasses can enhance some color contrast and block blue light, so the brighter days, wear brown, such as snow.
l  Yellow/amber is a yellower color than brown, which can enhance color contrast to a great extent, and blocks almost all blue light. To separate traffic lights, do not choose this color.
l  Red and orange are more suitable for cloudy winter days.
l  Purple is suitable for people who want to hunt on green grass.
l  Copper color can simultaneously harmonize the colors of sky and grass and is suitable for golfing.
l  Blue and green can enhance the contrast of yellow, suitable for playing tennis.
3.     Lens material
Lenses were made of NXT polyurethane, impact-resistant, flexible, lightweight, with great optical clarity,but it’s expensive. Polycarbonate is easy to scratch and less optically clear than NXT polyurethane, but cheaper. Acrylic is also cheap, but it is the least durable and the most transparent.
Glasses shape
1.    Pilot

The typical brand, Ray-ban, has a round shape and the outer sides are down.And it is almost suitable for all face types.
2.    Oval

Notice the difference between Oval and Pilot. The shape is round, but the outer sides do not have a downward drop shape,it’s suitable for oval face, square face.
3.    Butterfly

Upturned at both corners, butterfly winged. It’s suitable for oval face and heart-shaped face.
4.    Cat eye

Notice the difference between it and Butterfly. Cat eye is more round, narrower in the middle, and more angular in both corners.It’s  suitable for oval face, heart-shaped face, square face.
5.    Square

Large square, suitable for oval face, round face.
6.    Rectangle

Notice the difference between it and Oval, Oval is more round, this is comparison. Rectangular, suitable for oval face, square face, round face.
7.    Round

Round, it’s suitable for oval face, heart-shaped face, square face.
8.    Semi-Rimless

Square, the lower part does not have a frame, suitable for a square face, heart-shaped face. General sports glasses use this style. General fashion brands seldom do the lower half of the style without frame, generally do not make such a slender Rectangle, but made of Square type.

9.    Shield



A large range of connections in the middle. Suitable for oval face, round face.
10. Wayfarer

The top is straight and long. It was popular in the United States in the 1950s and 1960s and is now a retro style. Suitable for oval face, round face.
The above is my share of sunglasses and I hope to help you. Thanks for the support. More sunglasses come from www.25880.com

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