One of the most used types of sunglasses are those with polarized lenses. Polarized sunglasses have numerous beneficial effects for the people wearing them. None other type of sunglasses is capable of blocking glare like polarized sunglasses are. And as we all know sunglasses are more than just a trendy accessory, so they need to have good qualities for protecting our eyes and vision as well. This is exactly why polarized sunglasses are one of the most preferable types of sunglasses. However there are some negative aspects of sunglasses with polarized lenses which you should know about. When you know the negative and positive effects of polarized sunglasses you will be aware when they will be useful for you and when not. First of all sunglasses (in Denmark we call those solbriller) with polarized lenses are mainly designed to block reflected sunlight also known as glare. This type of light is horizontal and this is why the other types of sunglasses are not capable of blocking it properly. Only the sunglasses with polarization have special filters in their lenses that allow them to perfectly block the reflected sunlight or glare. The major positive effects of polarized sunglasses are that they allow the person wearing them to see clearly and without any frustration whatsoever even in the brightest days. When the sun is very bright the amount of glare is significantly higher, this is why your eyes are getting frustrated and tired when you spend a lot of time in the open in the bright and sunny days. Polarized lenses will improve your vision in these situations and your vision will be safe. Glare can cause some vision disorders and eye related problems, a major benefit of polarized sunglasses is that they will effectively protect you against all of those problems. Since almost every surface reflects sunlight, every time you are outside your eyes are exposed to glare, so without polarized sunglasses you are exposed to all of the dangerous effects it brings as well. This is why sunglasses with polarized lenses are your best choice whenever you are going to spend a lot of time in the open, whether it is for taking a walk, playing some kind of a sport, or even driving your car, polarized sunglasses will be an effective way to protect your eyes. Despite their numerous advantages, polarized sunglasses can be a bit of a problem sometimes. Though they are usually very useful for drivers, if the windows of a car are coated with polarization filters themselves, wearing polarized sunglasses is not advisable. In this situation the both polarized surfaces might worsen your vision and there might be an illusion that there are dark spots on the windshield of the car. Viewing liquid crystal displays or LCDs is also a bit of a problem with polarized sunglasses. Their filters will make those displays very unclear and it will be hard to read them with your sunglasses on.