Polarised sunglasses tend to be significantly more expensive than regular shades, and it is essential to ensure that you are getting your money’s worth.
With temperatures reaching 35℃ in Sydney, the sweltering sun proves to be a pain and is bound to leave you squinting. Products like Ozeano’s Vision Eco-friendly sunglasses have been in the spotlight for keeping millions under the sun safe while being sustainable and friendly to the environment!
What are Polarised Sunglasses, and how do they work?
Polarised lenses are coated with a particular chemical whose molecules are arranged to block out light passing through at a certain angle.
Typically, light is reflected off every surface, but it is reflected at one angle only and is a little more intense when it bounces off a smooth surface. This is colloquially termed a glare.
The filter blocks out all horizontal light, and only waves travelling vertically to the eye can pass through. This reduces or eliminates any effect light glares have on you!
Some glasses are insufficiently polarised, while others could be fake. In such instances, it pays off to know if you have a valuable and functional product at hand and here are a few easy steps to confirm the same.
1. Visual Observation
Many companies place temporary stickers on the lenses, which tell you if they are polarized. Other manufacturers have specific patterns or designs that they mark authentic products with. There is no cost barrier, and it is pretty easy to print a fake sticker.
If you order from verified product sites such as Ozeano Vision Eco-Friendly sunglasses, chances are your product details can easily be found online, and you can trust these details.
2.Test with a pair of Polarised Glasses
If you have a pair of polarised glasses, place them in front of the test sunglasses about an inch away. Align them and hold them out in front of you. You should see a distinct yet darkened image. Now hold the test sunglasses at a 60° angle and then at a 90° angle from the centre. The image should be darkest at 90°. If there is no darkening, this proves the absence of a polarising filter.
3.Test Sunglasses with Reflective Surfaces
You will need a highly reflective surface and a source of light. Focus the source of light towards the reflective surface and view the glare through your sunglasses. Rotate your sunglasses gradually until it is placed at 60°. If the glare disappears at specific points, your pair of sunglasses has a polarization filter.
In most cases, surfaces do not completely polarise light, and a little reflected light is still seen.
4.Polarization Test Cards
Polarisation test cards can be bought, and they are cards with unique surfaces that reflect polarized light. A distinct pattern or design can be seen on the card when viewed through a polarised lens. This provides a definitive result without the added pressure of doubting whether a result is positive or negative.
Some models also come along with test stickers. While creating false functional stickers is difficult, it is not impossible, and it might be clever to purchase test cards separately.
Smartphones are already equipped with anti-glare technology, and this is based on polarization mechanics. Wear the test sunglasses and view your screen while turning your head sideways. If the image tends to darken in certain regions, a polarization filter is most likely present.
Multiple methods can be used to test the presence of a polarization filter, but distinguishing a positive result from a negative one can be difficult. Given the product’s price tags, it is wiser to test out the product before purchasing it or procuring them from verified manufacturers.