Outdoor activities such as hiking, camping and canoeing are becoming increasingly popular. To perfrom well, in addition to sun protection, a good pair of sunglasses is vital. According to research, when UV rays hit the eyes, the brain secretes substances that make people feel tired. This, in turn, stimulates the body to secrete melanin, causing freckles and darkening of the skin. Wearing sunglasses can block UV rays from entering your eyes, reduce the above-mentioned skin blemishes, and even protect your eyes from dust or small bugs. But how to pick the right sunglasses? Refer to the following shopping guide to find out.

1. UV filtering and light transmission

The UV filtration rate is the percentage of UV rays that are filtered. The higher the index, the closer to 100% and the stronger the effect of UV blocking. The lower the index, the darker the lens will be and the more difficult it is for light to penetrate. Recently, in addition to specified lenses, sunglasses allowing users to change lenses freely according to weather conditions are becoming more popular, not just for flexibility and comfort, but also for adjustment during sports.

2. Frame design

The main function of sunglasses is to filter light, so the larger the frame, the higher the coverage rate and the better the light blocking effect. However, since lenses are often curved, it is important to try them on for a while to see if you get dizzy or have any other reactions before deciding.

3. Material

Many people who wear glasses have experienced their glasses slipping due to sweating or movement. This can also happen with sunglasses. Before buying, consider whether the frames are made of a rubber material which will remain fixed during sports and are less likely to slip off. Also the lighter the glasses are, the less discomfort you will experience when wearing them for long periods of time. Some sunglasses use special materials to reduce fogging and improve stability during sports.

4. Face shape

Different face shapes may require different sunglasses. When choosing sunglasses, consider styles that complement your face. Don’t buy sunglasses that are identical to the shape of your face. If you have a round face, choose a square frame for a more balanced visual effect.

5. Lens colour

Different colours of lenses produce varying effects when used in different weather conditions. Light-coloured lenses prevent the light from being too dark and blurring your vision. This reduces the chance of accidents. Sunglass lenses are broadly divided into the following three colours: