There have been many aesthetic and technological improvements in sunglasses. One of them is the polarized glass. Before polarized glasses were invented, sunglasses didn’t do a very good job of cutting glare. Compared to those early sunglasses, polarized sunglasses have certainly brought in many changes.
What causes glare?
When light reflects from surfaces such as snow, water, or a road, it is generally polarized horizontally (instead of scattering, the reflected light travels in a horizontal direction). This light can be very intense sometimes and we term this as glare.
For long, fishermen and boaters who spend a lot of time on the water have benefited from the glare cutting properties of polarized glasses. In the last few years however, others have also realized the benefits of polarized glasses. These include surfers, skiers, sportspeople, golfers, cyclists, joggers, etc.
Benefits of polarized sunglasses
Polarized glasses are also beneficial to drivers who can use them to cut the glare reflected from the bonnet of their cars or the road surface. People who have just undergone eye surgery (such as cataract surgeries) can also use polarized lenses.
Polarized sunglasses have a number of advantages. Their first and foremost function is to reduce glare. They also enhance contrast and reduce squinting. Apart from this, polarized lenses can be tinted or coated. They are thin and lightweight.
Other benefits of polarized sunglasses are that they reduce eyestrain while providing greater comfort. They provide safety to the eyes. The eyes are rested, and the wearer gets a realistic perception when he sees things. Since reflections are reduced, visual acuity is enhanced.