Polarized lenses were created in order to reduce any glare caused by a light source. Glasses that have been polarized make working on a computer, playing sports, and spending time in the sun easier on a person's eyes. There are various types of polarized lenses available, and consumers seeking to purchase a pair of polarized glasses should understand the fundamental differences between different types of polarization prior to purchase. Essentially, there are two types of polarized lenses available: 0.75 mm lenses and 1.1 mm lenses.
The difference between the two is the thickness of the film used to create the polarization. The thinner, 0.75 mm lenses are good for most casual sports. The thicker, 1.1mm lenses are more expensive, although the thicker film does not make glasses of this type any better when it comes to glare reduction.
Not only do polarized lenses block harmful sunlight rays, they also help wearers to see clearly when driving or when participating in outdoor sports. While these lenses are ideal in almost every situation, skiers, snowboarders, or motorcycle drivers should not wear polarized sunglasses. Sometimes, the polarization will prevent a person from seeing details clearly, and when shadows are blocked, snow sports and motorcycle driving can be dangerous. Skiers and snowboarders may not be able to determine a small jump from a large hole, for example, and motorcycle drivers may not be able to see the difference between pavement and wet pavement.
Still, for the most part, sunglasses that include polarized lenses are important to eye care. When glasses that are not polarized are worn, ultra violet rays are allowed to penetrate the naked eye. In addition, glare that can be caused from nearly any object will irritate the eye causing blurred vision.
Polarization may affect a wearer's ability to view a liquid crystal display (LCD) screen. When a person finds that his polarized glasses prevent him from viewing an LCD screen, he can simply tilt his head 45° to either side. This adjustment should allow for corrected vision. Another polarized lens, which allows 3D images to be viewed, may cause vertigo since they are filtered differently from regular polarized glasses. Anyone wearing 3D glasses should be careful not to become dizzy.
Many different companies make glasses that are polarized. Some companies manufacture sunglasses that are created for specific sports, and these glasses might be better than most others due to the technology use. To find glasses of this type, shoppers can visit popular manufacturers. As with most other purchases, it is best to try on a pair of sunglasses prior to purchase.