To understand how, you will need to understand how glare works and how polarised lenses work. When light bounces off of a surface, its light waves travel in all directions. Some light travels in horizontal waves, while others travel in vertical waves. However, if light hits a reflective surface such as water, snow, even cars or buildings at just the right angle, some of the light becomes "polarized" or 'polarization'.
This means that vertical light waves are absorbed while horizontal light waves bounce off the surface. This light can become polarized, resulting in glare that can interfere with your vision by striking the eyes intensely. Only polarised lenses can remove this glare.
Polarised lenses are laminated with tiny vertical stripes that only allow vertically angled light to enter the wearer's eyes. Glare is eliminated because the horizontal light waves cannot bypass the vertical filter. But expectations…. Droopy eyelids can affect more than your appearance. Over time, they can start to limit your field of vision and impact your ability to see.
Keratoconus is a disorder that leads to thinning of your cornea. It primarily affects children and young adults. We explain causes, treatment, and…. Iritis, also known as anterior uveitis, involves the inflammation of the iris, the colored part of your eye. It's important to get medical care if you…. Health Conditions Discover Plan Connect. What Are Polarized Lenses? Medically reviewed by Ann Marie Griff, O.
Who uses polarized lenses? Benefits of polarized lenses. Disadvantages of polarized lenses. How polarized lenses work. But how exactly does this filtration work? Always remember that polarised sunglasses are still UV protective , but their secondary benefit filters horizontally orientated light, commonly known as glare.
Lakes, shiny walkways or those frosty winter mornings where the sun is practically blinding you as you try and navigate your journey with your eyes half closed. Glare happens when overhead sunlight reflects off these shiny surfaces, becoming reoriented and condensed into horizontally aligned light.
This is exactly why polarised sunglasses can pay off because they filter-out this annoying and potentially hazardous glare from passing through your lenses. Most horizontally orientated light cannot pass through a polarised lens which provides you smooth and consistent vision, devoid of any high or low areas of contrast. This consistent filtration in varying conditions is why polarised sunglasses are more expensive and widely considered as a better type of sun-lens.
This is why polarised lenses are arguably a better investment than regular tinted sun lenses. Everyday tasks such as driving require you to focus for long periods of time. The reduction of glare is going to help to reduce visual fatigue, diminishing reflections and distractions. In fact, polarised lenses have nothing to do with eye-protection at all.
This secondary addition is simply a way of improving your visual experience by reducing reflected sun glare. Behind a darkened sun-lens, you pupils naturally dilate to let in more light to help you see. Without full UV protection, your eyes are now even more susceptible from permanent damage from the sun. But compared to non-polarised lenses, their characteristics can pose certain disadvantages due to the way that they work.
Many people wait for the first bright, sunny day to pick up a new pair of sunglasses. But leaving eye protection to the last second can often result in buying cheap, flimsy frames.
Once you decide that you want to spend a little more to get a better block between you and harmful UV rays, however, the choices can seem confusing and overwhelming. Particularly when it comes to polarized lenses. While all tinted lenses reduce brightness, polarized lenses are particularly useful for limiting glare. Glare is what happens when the sun hits a flat surface and the light is reflected back into your eye at a greater magnitude. Harsh glare also has some harmful impacts on your immediate vision — from reduced depth and colour perception, all the way to temporary blindness.
Polarized sunglasses specifically filter much of this glare, giving you a clearer vision with less eye strain. Polarized sunglasses lenses contain a chemical filter that absorbs horizontal light waves reflections , while allowing the vertical waves to pass through direct light. By removing the horizontally reflected light, the polarized chemical filter eliminates any glare but preserves colour, depth, and clarity. Buying polarized lenses guarantees the highest quality protection for your eyes and you have to consider several aspects in order to choose them wisely.
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