It is now widely accepted that exposure to sunlight over the long term can have a detrimental effect on your sight and may lead to the development of conditions such as cataracts and macular degeneration.
Eye care professionals generally recommend protection from UV exposure, and the most convenient way to protect your eyes is by using Transitions lenses.
Transitions lenses are actually photochromic lenses that protect your eyes from the harmful effects of UV rays by darkening automatically when they are exposed to ultraviolet light. For example, when you walk outside into bright sunlight they will become very dark and become lighter again when you return indoors.
This is because photochromic molecules in the lenses change structure when they are exposed to UV light and work by constantly recalibrating so that the level of tint changes to allow the optimal level of light to reach your eyes. These lenses are able to block 100% of UVA and UVB rays, both of which research has shown to be harmful.
Because Transitions lenses start to darken immediately they come into contact with UV light and become darker as the UV radiation becomes more intense, people who wear them are not normally aware of the transition from light to dark tint, or the reverse when they return indoors. They are also very helpful in reducing glare in bright sun light, enhancing your quality of vision and helping you see better whatever the level of light.
In the summer you will find that you do not need to wear sunglasses outside under most conditions if you are using Transition lenses. Because the lenses darken automatically according to the amount of UV rays, they improve your vision in all different levels of light. On sunny days they will go very dark when you go outside, and if the weather becomes overcast or cloudy they will lighten up accordingly.
There are, however, certain conditions when you may need additional protection in the form of sunglasses. Photochromic lenses do not darken and work in the car because car windscreens block the UV rays that would normally cause your lenses to activate in sunny conditions. In very high temperatures, Transition lenses may not become as dark as sunglasses, so you may need to consider a more specialised solution.
Transitions XTRActive lenses can be used behind a car windscreen when it is not too bright because, in addition to reacting to UV light, they react to visible light generally, but Transition Drivewear lenses are the ideal lenses for driving. These sun lenses react to changes in visible light conditions but are also polarised, so they improve your visual performance. By changing the degree of colour and brightness automatically, they make your driving experience far more enjoyable. Your eyecare professional will be able to advise you on the best options for your lifestyle, whether you need polarised sunglasses, prescription sunglasses or performance sunwear. Variable polarisation is a feature of the new Transitions Vantage lenses that may be recommended for driving, and Transitions Performance lenses are used by many high end sunglasses manufacturers.
Any time you would normally use clear lenses, Transition lenses are an excellent alternative. Because they adjust so quickly to changing light conditions, they are very convenient and change to the right level of tint immediately there is a change in light conditions, protecting your eyes from potentially damaging UV radiation. You can use Transition lenses for normal everyday work such as using a computer or for any situation in which you would wear clear lenses.
Whatever frame style you favour and whichever lens material and design you choose, you can have confidence that Transition lenses will block 100% of UV rays. They are available in many lens designs including progressives and bifocals as well as single vision and in different materials; standard, shatter resistant and high index. There is a choice of brown or grey Transition lenses, and they are compatible with options such as scratch resistant coatings, anti reflective coatings and edge polish.
Transition lenses do protect you against the damage that UVA and UVB rays can cause, and now many eye care professionals are suggesting that it is worth considering photochromic lenses for children’s eyewear to prevent the development of conditions such as cataracts over time, as well as for adults.