Our eyes are always exposed to light. Flat surfaces such as water, snow, metal, light-coloured sand or even a rain-soaked road reflect the incident light. Unpleasant reflections and mirroring occur – our eyes tire and contrast vision is also reduced. Polarised sunglasses can help to minimise glare and so increase visual comfort.
How do polarized sunglasses work?
Usually, natural light travels unpolarised - it oscillates evenly in all directions. However, when the light hits a flat surface, e.g. a wet road or snow, it is reflected horizontally and vertically. The light rays are bundled and directed in one direction, i.e. polarised. This creates unpleasant glare
To reduce this effect, polarised sunglasses are equipped with a special filter. This polarising filter blocks reflected light rays and thus absorbs a large part of the reflections. Objects look crisper and clearer and eye strain is reduced.
When are polarized sunglasses useful?
Wherever unpleasant light glare occurs, polarised sunglasses ensure more relaxed and contrast-rich vision. Water sports enthusiasts, anglers, skiers, car drivers and motorcyclists in particular appreciate this effect. Light-sensitive people also benefit from polarised sunglass lenses, as they reduce brightness.
Advantages of polarized lenses:
- Polarising filters reflections and glare
- Increase visual comfortImprove contrast and visual clarity
- Improve spatial perception
- Reduce eye strain
Disadvantages of polarized lenses:
- Some LCD displays (e.g. PC monitors, smartphones or navigation devices), which are also often equipped with a polarisation filter, cannot be perceived as well or appear black
Comparison: With polarisation filter vs. without polarisation filter