Of course sunglasses do have other purposes and protecting your eyes is still our number one priority. So there is absolutely no reason why a great looking snazzy pair of shades cannot also be providing you with 100% protection from UV, be in the appropriate coloured tint for the task, and still comes with all the scratch resistant and polarising glare-free technology.
Most surfaces will reflect light. Water, snow, car windshields and the road surface are some of the most common. Extremely bright reflections can be distracting and interfere with vision. This is particularly dangerous when driving, riding a motorbike, skiing or boating. Sunglasses that include polarised filters or mirror coatings will eliminate glare for safer and more comfortable vision.
In very bright conditions, the pupil which controls the amount of light reaching the light sensitive retina, cannot constrict small enough to reduce light to a comfortable level. This causes a person to squint, using the eyelids to further reduce light entering the eye. Muscle fatigue associated with squinting and constant constriction of the pupil can lead to headache and eyestrain.
All sunglass lenses are tinted to cut down on overall brightness and enhance terrain definition.
However, your choice of tint colours affects your vision by influencing:
- how much visible light reaches your eyes
- how well you see other colours
- how well you see contrasts
By selecting the correct coloured tint for your sport or activity will help to improve your visual acuity for that environment.
When should you wear sunglasses?
It’s generally a good idea to wear sunglasses anytime you’re outdoors but especially when:
- In summer when UV radiation is at least x3 higher than it is during winter
- At the beach or near the water (one of the most reflective surfaces)
- You’re in the mountains or outside at any high altitudes
- If you have had cataract surgery or are taking photo-sensitising drugs (our Optometrist can advise you on this, you should bring the latest list of your medications to discuss ocular side-effects