Polarized lenses not only reduce glare, they make images appear sharper and clearer, increasing visual clarity and comfort. For all the benefits we receive from the sun, its light can pose serious vision problems. Sunlight reflecting off smooth water, snow or flat roads can create glare which is not only annoying but can often be dangerous. Blinding sun glare can cause accidents, snow blindness and can even sunburn your eyes. Long term exposure to sun glare has been known to cause cataracts.
Thankfully, polarized lenses can shield you against the dangers of intense glare. A virtually invisible filter can be built into lenses to eliminate the amount of reflecting light that enters the eye. Available for prescription and non-prescription sunglasses, polarized lenses can be worn indoors by light-sensitive people, including post-cataract surgery patients and those continually exposed to bright sunlight through windows.
Explore over 1,, combinations! Limited Editions Each release is percent unique - perfect for anyone who thinks of their sunglasses not as a necessity, but as a conversation-starter. Collaborations Here at Knockaround, we love paying tribute to our favorite brands, projects, places, and sports teams.
All Special Releases. Our Story. November 15, What are Polarized Sunglasses? How do Polarized Sunglasses Work? Polarized vs. Non-Polarized Non-polarized lenses treat all sunlight equally and reduce the overall intensity.
This advanced performance can allow: Anglers to see beneath the surface of a lake or river. Drivers to focus unhindered on the road ahead. Polarized lenses cut hazardous glare off of flat surfaces such as water, glass, and asphalt.
The question this article will answer is: how do polarized sunglass lenses work? In , a French physicist and mathematician by the name of Etienne-Louis Malus discovered that light waves from the sun, which usually vibrate in all directions, can be aligned in one direction when reflected off something.
One way to understand this is to think of light like a knuckleball. But if the bat connects solidly, the ball will go soaring back out, spinning gracefully without any of that erratic motion. In the same way, light that is reflected off a horizontal surface loses its erratic motion and travels in one concentrated beam in a horizontal motion. This is what we perceive as glare. But if you turn the mattress upright, it can pass through the doorway without any issue.
When the polarization axis is vertical, all light that has been polarized through reflection and is now traveling horizontally such as the glare off of water or a windshield , will be blocked by the filter.
If you were to take 2 of these filters and cross them perpendicular to one another, less light would pass through. The filter with a horizontal axis will block vertical light, and the vertical axis will block horizontal light. You can also verify whether your lenses are polarized by holding them in front of a back-lit LCD screen.
As you turn the lens, it should become darker. This can pose a major safety hazard. Adam Debrowski also contributed to this article. Frequently asked questions. Accessed October Sunglasses for pilots: Beyond the image. Federal Aviation Administration. Home Sunglasses Why Sunglasses? Notes and References Frequently asked questions. Schedule an exam Find Eye Doctor. More Articles.
0コメント