They are also recommended for driving in daylight and at night and in fact can reduce the glare that comes off a long, flat surface such as the hood of the car or a highway. Polarized sunglasses can also be used indoors by light-sensitive patients or by those exposed to bright light through windows. Light reflected from surfaces like a flat road or smooth water is generally horizontally polarized. This horizontally polarized light is blocked by the vertically oriented polarizers in the lenses. There is some debate on the effects of polarized lenses on snow-covered surfaces.
Some experts say they can reduce the intense glare that is caused by sunlight reflecting off snow.
And some purport that the lenses are not satisfactory for sports such as downhill skiing because they may not provide the contrast the eye needs to distinguish ice patches or moguls. The problem with LCDs is that when viewed through polarized lenses from a certain angle, they can be invisible. However, for most other sports and activities, polarized sunglasses can offer great advantages and benefits to the wearer. There are also many options available to the consumer in the types of polarized lenses on the market. Polarized lenses are great at reducing glare, as seen in this photo supplied by Serengeti.