• 09 APR 13
    Polarized Sunglass Lenses

    Polarized Sunglass Lenses

    For years, fishermen have used polarized sunglasses to reduce glare from the water and to give more definition within the water.

    In the past few years, however, the benefits of polarized sunglasses have been realized by a variety of outdoor sports enthusiasts as well as drivers and general use wearers.

    The sportsmen and women that are most likely to benefit from these type of lenses are: golfers, bikers, joggers, fishermen and woman, tennis players etc, as a matter of fact, anyone who enjoys the outdoors and who would enjoy a clearer view and elimination of glare.

    Polarized sunglasses can also be used indoors by light-sensitive people such as post-cataract surgery patients or by those exposed to bright light.

    How do Polarized lenses work?

    Light reflected from surfaces like a flat road or smooth water is generally horizontally polarized. This horizontally polarized light is blocked by the vertically oriented polarizers in the lenses. The result: a reduction in annoying and sometimes dangerous glare.

    Some experts say they can reduce the intense glare that is caused by sunlight reflecting off snow. Polarized lenses react adversely with liquid crystal displays (LCDs) found on the dashboards of some cars and on aeroplane instrument panels or in other places such as the digital screens on automatic teller (bank) machines.

    The problem with LCDs is that when viewed through polarized lenses from a certain angle, they can be invisible. However, for most other sports and activities, polarized sunglasses can offer great advantages. And today, many types of polarized lenses are available on the market.

    Sunglasses with tinted lenses vs Polarized lenses

    The degree of darkness of a lens will reduce the infrared rays, but do not necessarily reduce the ultraviolet rays. Glass offers no protection from UV rays, however a CR39 (plastic) lens does to varying degrees.

    Polarized lenses offer the elimination of glare and will also filter the harmful UV rays.

    Advantages of Polarized Lenses


    • Filters glare
    • Enhances contrast
    • Constant density tints
    • Tintable and coatable
    • Lightweight
    • Thin



    • Reduces eyestrain, greater comfort
    • Improves visual acuity, provides safety
    • Eyes feel rested
    • Realistic perception
    • Reduces reflections and enhances visual clarity
    • Certain lens materials can be darkened and provides limitless colour options


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Michele Hlava Optometrists

Service Excellence. We enjoy and are disciplined to a team approach, and look upon our patients and clients as part of our family.

Michele Hlava Optometrists
Physical Address
18 Dirkie Uys Street
Somerset West

GPS 34°4’53.56"S +18°50’51.60"E

Postal Address
P.O.Box 177
Somerset West
Vergelegen Optometrists
Vergelegen Plein Checkers centre
Sir Lowrys Pass Rd.
Somerset West
Sanctuary Optometrists
Shop G4, The Sanctuary,
De Beers Avenue, Paardevlei,
Somerset West, 7130.
  • M.Hlava Optometrist Phone: +27 21 852 3667

  • M.Hlava Optometrist Fax: +27 21 851 7890

  • M.Hlava Email: aspec@iafrica.com

  • Vergelegen Phone: +27 21 851 1670

  • Vergelegen Fax: 086 542 1904

  • Vergelegen Email: aspec2@telkomsa.net

  • Sanctuary Optometrists: +27 21 492 3903

  • Sanctuary Email: aspec4@iafrica.com