u003cbru003eThe most important factor when buying a pair of sunglasses
is to ensure that they provide full protection against UVA and UVB radiation. If you will wear sunglasses for a long time while running or hiking, and sweat, then you also need to consider a comfortable fit, anti-fog and lens color. Recommended reading: The perfect glasses for winter sports , especially today’s running glasses feature non-slip nose pads, super lightweight adjustable frames, interchangeable lenses and careful design to ensure ventilation and anti-fogging. Lens color: If you will run under different conditions, then you need to consider buying sunglasses with interchangeable or polarized lenses to meet all your needs. Black: blue/gray/green/brown is suitable for sunny and bright sun conditions, making the eyes most comfortable under harsh light. Gold: Yellow, gold and amber are suitable for low-light situations. They filter blue light and make it easy to see protrusions and borders on the ground. Polarization/Discoloration: Color-changing lenses are extremely suitable for very bright situations because they weaken the glare of sunlight reflected on the salt flats and sand. However, their base color is darker than normal lenses, so they may become too dark to be usable by the end of the day because the shadows become longer. Mirror lens: By reflecting the sunlight to the ground to reduce the glare of the light, improve the effectiveness of the color glow lens. Transparent: Use in dark or windy conditions, when you want to prevent your eyes from tearing while running. UV protection: you should buy sunglasses that provide protection against both UVA and UVB radiation. Excessive exposure to UV in a short period of time can cause photokeratitis, which is basically a sunburn of the eyes. Prolonged exposure to UV light can cause permanent damage, so make sure your sunglasses provide full protection. This is especially important in deserts or salt flats, where sunlight will bounce off the ground like snow. Ventilation: In the case of humidity and rain or you may be all sweaty, you want to choose a frame that provides good ventilation to avoid foggy and unclear. Choose a lens series far away from the face, so that the air can circulate freely, and may wish to consider anti-fog coating. Material: If you are participating in sports, it is best to ensure that your lenses are made of anti-fragmentation materials, such as polycarbonate instead of traditional glass or plastic. Also consider the material of the frame-the more flexible, the less likely it is to break, such as when dropped or stuffed into a fully packed running backpack. Fit: Also consider the comfortable fit of wearing sunglasses for a long time. You want a lightweight one, which may include a rubberized nose bridge and adjustable ear positions to keep the glasses in place when running. ??
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