When sunglasses should be worn
Sunglasses are designed for outdoor daytime wear in bright sunshine or where there is glare. They should he worn when bright sunlight causes watering of the eyes, squinting or excessive blinking.
Sunglasses are essential during periods of prolonged exposure to sunlight. Besides visible light, sunlight contains two powerful invisible forms of radiation: ultraviolet and infrared. Continued exposure to these, especially ultraviolet, can cause serious eye damage.
Optometrists recommend that people who spend most of their time outside or who work near snow, water or sand should wear sunglasses that filter out both ultra violet and infrared rays. Because the effects of exposure to UV accumulate over a person’s lifetime, it is important for children as well as adults to wear eye protection.
Sunglasses should not he worn at night — particularly not while driving. This is because in the dark they can reduce vision to dangerously low levels. A driver could miss seeing a pedestrian or a parked car.
If you feel that you need to wear sunglasses continually for comfort, you should consult our optometrist; you may have a problem with your eyes or vision.
Differences between types of sunglass lenses
What to look for in sunglasses
Make sure that the lenses conform to the Australian Standard that specifies that the glasses are manufactured from quality ophthalmic materials, which:
Plastic lenses are generally more impact resistant than glass, and lighter in weight. However, they scratch more easily unless they have a scratch-resistant coating and, unlike some glass lenses, do not filter out infrared rays.
Check that the frame:
Sunglass Standards became law in Australia on 1 October 1985. All sunglasses sold in Australia have to pass less UV than visible light. In practice, this means that they all are 100% UV. We have a UV tester that will tell you how effective your sunglasses are at blocking UV.