Facts About Polarized Sunglasses

Brief facts:

We all know that sunglasses are mainly worn as a protective eyewear. They protect your eyes from the strong ultraviolet rays of the sun; any other harsh and bright lights which can be dangerous for your eyes when exposed to for a long duration. Injuries can be caused to various parts of the eyes like the cornea; iris and the retina and constant injuries can leave a permanent and long lasting damage.

If you thought sunglasses are only for the summers, think again. Of course, to dodge the staunch sunlight, you have to wear sunglasses but they are also worn during driving. People with contact leans have to rely on sunglasses from dust particles and debris entering their eyes as it can be painful and leads to scratching of the cornea.

Sunglasses are also worn by sportsman indulging in sports and activities like kayaking, rock climbing, motorcycle racing, jet water skiing, ice climbing, snorkeling, scuba diving and many others. There are special sunglasses made for these activities like sports sunglasses, goggles for aqueous activities and so on. These sunglasses have a special film on them to cut the glare from water, snow and glass.

Did you know that sunglasses with polarizing films on them are used extensively while fishing and boating? These sunglasses are designed in such a way that one can look right through water unlike conventional sunglasses wherein the surrounding only gets dimmer.

It works like this:

To make it less confusing and less scientific – although light is refracted, transmitted, scattered or reflected, light waves travel more or less horizontal or vertical. It orients from a single axis which is said to be polarization. Sunglasses with polarizing effect works the same way like a venetian blind blocking the sunlight from the window.

Sunglasses have vertical strips of polarized film on them which blocks any light vibrations traveling in horizontal direction for e.g. light reflected from the water surface or from the hood of the car. At the same time these sunglasses are not effective when the sun is directly overhead. At other angles, these sunglasses will not eliminate all the light from entering but cuts off most of it.

Sunglasses with polarized films cannot be used to read LCD display screens, mobile phones or GPS device. It cannot be used to read the digital screens at the ATM’s.

Are polarized sunglasses of any help?

It cannot be used as prescription sunglasses for constant wearing. Such sunglasses should be combined with photo chromic lenses and worn indoors as well as outdoors. These are normally worn by people who have just had a cataract surgery as glare and harsh lights can be really painful. Glasses which have horizontal and vertical polarized lenses can be used for watching 3D movies.

Sunglasses with polarizing effect:

It makes sense to buy a branded pair of sunglasses with polarizing effect for the simple reason that you won’t be cheated. There are all sorts of sunglasses in the market, selling these types of sunglasses that could be fake but designer sunglasses will definitely be original.

Source of the text where it first appeared by M Rajshekar
Facts About Polarized Sunglasses

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