Sunglasses – Importance more than your style

India becomes more digitally connected. India is the third biggest country in terms of internet users in the world, with a highly social and mobile audience. It’s estimated as many as 121 million Indians are logged onto the internet. Many peoples are purchasing sunglasses from an online platform.  The main aim of wearing sunglasses not only protect your eyes from dust, sands, external injury or allergens, it should protect your eyes from harmful ultraviolet rays. Specially UV-A and UV-B rays. UV rays can cause short-term and long-term ocular problems like photokeratitis (A painful inflammation of the cornea), snow blindness ( The common term for severe photokeratitis, which causes temporary vision loss usually lasting 1-2 days), early cataract, macular degeneration, pterygium and various forms of eye cancer. Sunglasses should be thought of with the same importance as motorcycle helmets. Its usage is mandatory immediately after some surgical procedures such as IntraLASIK and recommended for a certain time period in dusty areas when leaving the house and in front of a TV screen or computer monitor after LASEK. So whenever you purchase sunglasses, always look for its material and level of UV protection.

Of course, UV protection isn’t the only consideration when it comes to selecting sunglasses. In addition to UV protection, consider these extras:

  •   Blue-blocking lenses –                                                                                                        Blue-blocking lenses can make distant objects easier to  see, especially in snow or haze. They’re popular with skiers, boaters and hunters. Lenses that block all blue light are tinted amber.However, when driving, it’s recommended that tinted sunglasses be gray to ensure proper traffic light recognition. New research has suggested the sun high-energy visible (HEV) radiation means blue light may increase your long-term risk of macular degeneration. People with low blood plasma levels of vitamin-C and antioxidants especially appear as a risk of retinal damage from HEV radiation.
  • Polarized lenses –                                                                                                             Polarized lenses reduce reflected glare, such as sunlight that bounces off snow or water. They’re useful for skiing, driving, and fishing, to reduce reflected glare surrounding them.  Golfers and joggers also enjoy a clearer view along with the elimination of glare by polarized lenses.

 

  • Photochromic lenses –                                                                                                   Photochromic lenses automatically adjust to changing light intensities to protect you with a wider range of conditions (science in action). These lenses actually get darker (to block more light) on bright days, and lighter when conditions get darker. A couple of caveats: The photochromic process doesn’t happen instantly, and it takes longer to work in cold conditions. Photochromic lenses may be made of glass, polycarbonate, or other plastic.  Molecules of silver chloride or another silver halide are embedded in photochromic lenses. Also, it doesn’t work at all when you’re inside a car (the change in tint is activated by harmful UVB rays, which don’t penetrate your windshield.
  •   Polycarbonate lenses –                                                                                                      Polycarbonate lenses are lightweight and 10 times more impact-resistant than glasses or regular plastic lenses. Many eye care practitioners’s advice to use polycarbonate lenses for children’s eyeglasses for safety reasons. All polycarbonate lenses block virtually 100% of UV rays. Polycarbonate lenses offer impact protection during potentially hazardous sports and activities.
  • Mirror-coated lenses –                                                                                                               Mirror-coated lenses reduce visible light. Mirror coated is ideal for people those who are light sensitive. When selecting a mirror coat, be sure to keep in mind this coating can craze and scratch if the eye wears not handled with care. As a precaution mirrored coated lenses can have a factory applied hard coat that will make them more resistant to scratching.
  •   Gradient lenses –                                                                                                                  Single gradient lenses, which are dark on the top and lighter on the bottom, reduce glare while allowing you to see clearly. They’re useful for driving, but not sports.
  •  Double Gradient lenses –                                                                                                           Double gradient refers to lenses that are also tinted from the bottom up: The top and bottom are the darkest and the middle has a lighter tint. Double gradient lenses are a great choice if you want sunglasses that aren’t too dark but shield your eyes well against bright overhead sunlight and light reflecting off sand, water, and other reflective surfaces at your feet. These lenses are a good choice for water sports.

The high definition sunglasses will block 100%  UV and blue light.

References:-

  1. https://en.wikipedia.org/wiki/sunglass
  2. https://www.evo.com/how-to-buy-sunglasses-size-style-lens-guide.aspx


For more information you can visit below website

 Sunglasses –  How to Choose                                                               Sunglasses – Style & Face Shape                                                    Goggles – How to Choose                                                            Goggles – Lens Color & Tint Guide

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