The glasses of a regular sunglass are simply coated with UV protective layer and a special black tinted coating which doesn't allow most of the light rays (not glare) to enter eyes, thereby protecting them. They are not useful to see through the glare and thus are of no use when you most of your activity is centered with flat surfaces in the bright light.

Polarized sunglasses, on the other hand, employ a special type of glass whose polymers are oriented in vertical direction and thus completely cut the horizontal glare rays. The results from this simple trick are astounding. Apart from the protection from annoying and even dangerous glare, one gets all the benefits of a regular sunglass too.

One can't imagine going outside without equipping the sunglasses. Outdoor activists, cyclists, mountaineers and golfers swear by the protection offered by the sunglasses. However, regular piece of a sunglass simply can't withstand the glare reflection and one can't see things when in full bright sun.

Apart from mere protection from light and glare, specialized polarized sunglasses have entered the market. One of them is known as Polarized ?progressive lenses? which are perfect for someone who is suffering from presbyopia, but is outdoor enthusiast. For someone whose eyes are sensitive to light, polarized ?photo chromic lenses? is the ideal solution. They dynamically change from dark-outside to light-inside. This helps when you change your environments too frequently and the amount of light intensity differs too drastically. The eye cannot distinguish between patches of ice and moguls due to the poor contrast. This can prove dangerous, especially in somewhat low light conditions.

Most importantly, from the outer appearance, these sunglasses don't appear any different from the regular ones and still give the added benefit. A group of experts argue that like other environments, polarized sunglasses will reduce the glare and will improve the visibility. Other group says that they have a disadvantage of not providing enough contrast and therefore they may not be beneficial for skiers. The eye cannot distinguish between patches of ice and moguls due to the poor contrast. This can prove dangerous, especially in somewhat low light conditions.

These days, many sunglasses claim to be polarized but in truth they are not. There is a simple test which will enable you to determine the claim. Find any surface which is reflective (bonnet of a car, for example) and look towards it through one of the polarized lenses. Then, slowly rotate the glasses to an angle of 90 degrees, while continuously observing the degree of reflection. If the glasses are indeed polarized, you should see a significant reduction glare as you rotate the glass. If such is not the case, then you have been min-informed.

It is very essential for a person using spectacles to get it repaired at regular timely intervals. More over one should get his eye checked as and when prescribed by the doctor.