Sunglasses have other uses than just as a fashion accessory to a particular outfit.
Ultraviolet (UV) radiation has been attributed to the development of many eye problems including cataracts and age-related macular degeneration (AMD). They will also help to prevent wrinkles by protecting the delicate skin around the eyes from premature ageing. Good quality sunglasses protect your eyes from 100% of sun’s harmful UV rays.
Most surfaces will reflect light. Water, snow, car windshields and the road surface are some of the most common surfaces that we experience reflected light. Extremely bright reflections can distracting and interfere with vision. This is particularly dangerous when driving, riding a motorbike, skiing or boating.
Whether you are out cycling, skiing or just enjoying the view outdoors, sunglasses are an effective wind barrier. They reduce the rate of evaporation of tears and helps keep your eyes moist and comfortable. If you wear contact lenses, sunglasses will help to keep them moist and prevent windblown particles from getting in your eyes and causing a corneal abrasion. Consider close-fitting “wrap” style frames as these are a particularly effective barrier.
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.
Sunglasses reduce the amount of light reaching the eyes to a more comfortable level, eliminating the need for squinting and severe pupil constriction. Ensure you buy sunglasses that provide the correct category of protection
All sunglass lenses are tinted to cut down on overall brightness and enhance terrain definition. However, your choice of tint colours affect your vision by influencing:
By selecting the correct colour tint for your sport or activity will help to improve your visual acuity for that environment. Conversely, certain bright or unusual colours may alter your colour perception adversely. From a visual standpoint this is why it is usually best to choose lenses that are grey, brown or green.
When is it most important to wear sunglasses?
It’s generally a good idea to wear sunglasses anytime you’re outdoors but especially when: