The concept of sunglasses to most people seems so simple. You have two pieces of tinted glass or plastic a plastic or metal frame.
How much more straightforward can it be?
It turns out that there are many different things you can do with two pieces of glass, and these things can have a big effect on you when you use the lenses. There really is a difference between the various sunglasses you'll find out there.
There are four things that a good pair of sunglasses should do for you:
- Sunglasses provide protection from ultraviolet rays in sunlight. Ultraviolet (UV) light damages the cornea and the retina. Good sunglasses can eliminate UV rays completely. All sunglasses sold in Australia must be tested and labeled according to the Australian/New Zealand standard AS/NZS 1067:2003 Sunglasses and Fashion Spectacles.
This mandatory standard sets limits on the allowed transmittances of fashion spectacles and sunglasses. Cheap glasses which do not meet this standard must be called "fashion spectacles" and will sometimes be sold as "sunnies" to make you falsely believe they are protecting your eyes.
- Sunglasses provide protection from intense light. When the eye receives too much light, it naturally closes the iris. Once it has closed the iris as far as it can, the next step is squinting. If there is still too much light, as there can be when sunlight is reflecting off water or snow, the result is damage to the retina. Good sunglasses can block light entering the eyes by as much as 97 percent to avoid damage.
- Sunglasses provide protection from glare. Certain surfaces, such as water, can reflect a great deal
of light, and the bright spots can be distracting or can hide objects. Good sunglasses can completely eliminate this kind of glare using polarisation. Polarised sunglasses are great for fishing, other water sports, driving and at the snow.
- Sunglasses eliminate specific frequencies of light. Certain frequencies of light can blur vision, and others can enhance contrast. Choosing the right color for your sunglasses lets them work better in specific situations.
Fashion and function are important things to consider when choosing your sunglasses. If prescription sunglasses are needed, then other considerations such as shape and size may also be a factor.
Our trained staff and optometrist will help recommend not only what type of sunglasses will best suit your needs, but also help you to look your best when stepping out in to the harsh Australian sun.