With summers fast approaching, you would have definitely heard of polarised sunglasses. polarised sunglasses. But what do they exactly do, and do you actually need them?
Find all these answers here in this article!
Polarised sunglasses are used to reduce glare from water, glass, and snow – particularly horizontally reflected light. Glare deforms the true shapes and colour of the objects and makes them tough to see. Glare is not only annoying but also very dangerous for the eyes. They can even harm our vision. Glare is especially dangerous during driving as it may cause accidents.
Wearing polarised sunglasses helps in other activities as well as skiing and rowing.
How do these lenses work?
Do not confuse polarised frames with mirrored sunglasses. While mirrored sunnies do protect against glare to an extent, they are not the same as polarised ones.
Polarised lenses work by blocking the horizontal light waves and by only making the vertical light waves make through the filter in the lens. This is the way through which the glare is cut down and makes people see better.
When sunlight strikes a surface at an angle, it strikes back to the same angle. Most of the surfaces that cause glare reflect the same horizontal angle.
Their colour and shades depend on the materials used to make these sunglasses. The most common shades are grey and brown, but other tints like yellow, green, red, and other melanin colours are also very popular. Dark colour tints have a stronger effect than other colour tints.
What are the advantages of using polarised sunglasses?
Any high-quality sunglasses will have polarised lenses for better and clear vision. Some of the advantages are-
- It increases the visual comfort
- It sharpens the contrast between dark and light
- It makes objects clearer
- It reduces eye-strain
- It allows us to see the real colour of the picture
- Last but not the least, it reduces reflection and glare.
So wearing polarised sunglasses, one can experience the above advantages and keep their eyes in a good condition.
Disadvantages of polarised lenses
Nothing comes with any disadvantage. It is always said that if there are advantages to anything, there are side effects too. One should be careful and know the consequences beforehand to get prepared and take precautions. Thus polarised sunglasses have disadvantages too. The disadvantages of polarised sunglasses are-
- Polarised sunglasses are not good for everyone. Hence, all should not wear these glasses without recommendation. Some people may feel dizzy or see everything in 3D which may disturb their vision and see disoriented things. Thus for all, it is better to have tinted lenses.
- People sometimes have to read things on the LCD. The main example is the pilots. Wearing polarised lenses makes it hard to see and read things. Thus it is highly dangerous for these professions and pilots should avoid wearing these sunglasses.
- Polarised lenses should not be used at night. It is important to see the road at night, and wearing these glasses at night is very dangerous for people especially while driving.
Thus the above article is about polarised sunglasses and their advantages and disadvantages. One must read this before buying polarised sunglasses.
