Don’t let your eyes strain in varying light conditions have them intelligently adjust in transitions lenses (the transitions logo is a registered trademark ).
Transitions is a registered intelligent technology and transitions technology development meant light control is a trademark. Ensure you use genuine lenses. To trademark the transitions logo involved developing technology and transitions light features tested and verified by uses throughout the globe.
Often used for their light changing photochromic performance by changing between clear and various darknesses in the presence of ultraviolet (UV) radiation, such as when exposed to sunlight,indoors and at night.
Like skin, our eyes need sun protection. Damage is often spotted in eye exams and can contribute to vision problems.
Photochromic performance is influenced by temperature uv exposure and lens material.
Transitions lenses provide UV400 protection, % reduction of 100 UVA and UVB ,helping to preserve your long-term eye health.
UVA are the most prevalent and penetrating rays during all daylight hours throughout the year causing wrinkles, sun spots,skin cancer
UVB causes more sunburn but more prevalent in the middle of the day
UVC rays are absorbed by the ozone layer and generally don’t reach the earth’s surface. there are germicidal disinfectant uses of man-made UVC radiation such as in hospital settings.
Sunscreens have different physical filters and chemical absorbers for different UV bands
We have one of the highest levels of UV exposure and highest rates of skin cancer in the world.
You can still get burnt on cool or cloudy days from from UVB and HEV (high energy visible)though lower energy than UVA rays, they penetrate deeply into the eye and can cause retinal damage.
UV levels are proportionally greater in higher altitudes distance to the earth’s equator
UV and HEV levels are greater in wide open spaces, especially when highly reflective surfaces are present, like snow and sand.
UV damage can also depend upon a persons medications such as tetracycline, sulfa drugs, birth control pills, diuretics and tranquilizers,which can increase the body’s sensitivity.
Often backup pairs of glasses such as transitions are recommended as UV damage can be seen around the eyes and within the eyes.
The cost effective,convenient popular UV protective solution with a love them or exchange them policy with different styles,shades and tints though not all are polarised and ideal for driving due to windscreen UV blocking darkening.
Some brands are quicker acting than others and more temperature dependent.
Based on the the ozone forecast,and the incident angle of sunlight determined by latitude, day of year, and time of day the strength of UV radiation at ground level is calculated as energy frequency and wavelength are mathematically related.
UV RAYS DAMAGE MORE THAN JUST SKIN
You can’t see or feel UV rays, but they’re present all year long. And just like your skin, your eyes need protection.
UV levels and sun protection times are included in our local Bureau weather forecast.
Sun protection measures are absolutely recommended when the UV Index is 3 and above but you still get burnt on cool or cloudy days
As the light in your life constantly changes, so should your lenses. The new colour styles come with constantly adjusting technology that has been tested in over 200 lighting conditions across the globe and 1,000 wearer scenarios.
Kids Eye protection has to come from the beginning of life and they are available in all kinds of frames, for all ages. As you get older, your lens naturally absorbs more UV to protect your retina. Kids under five have particularly vulnerable eyes, so it’s especially important that they’re protected against UV rays by the correct lens material as they wear their glasses in all their different situations.
Transitions XTRActive contain a specially designed photochromic dye that responds to both UV light and natural (visible, clear or white) light, so they are able to moderately adapt in the car. The glass in car windscreens blocks more than 99% of UV light, so most photochromic lenses do not provide sufficient darkening in the car.
Make a style statement
All the features and benefits of Transitions XTRActive technology are available with on-trend style mirror finishes of 2019 transitions optical limited.
Transitions XTRActive is the darkest Transitions lens, which means the mirror effect is more pronounced and dramatic
Primarily an outdoor lens that can be worn indoors
Slight reflective mirror coating indoors on both the front and back lens surfaces
Transitions Vantage series has a variable level of polarization efficiency.The photochromic molecules in transition vantage lenses darken and align (to create polarisation ) according to amount of UV. Transitions Vantage is designed to be an everyday lens (mostly clear indoors and at night), and is a “variable polarization” lens, which means the level of glare-blocking polarization changes depending on UV exposure.
TEMPERATURE AND ITS EFFECT ON PHOTOCHROMIC TECHNOLOGY
When the lenses become cold the molecules begin to move slowly. This means that it will take somewhat longer for the lenses to adapt from dark to clear. When the lenses become warm the molecules speed up and become more reactive.
Transitions Drivewear polarized incorporate photochromic dyes designed to shift between a lighter and darker density by reacting to changing light conditions as most windscreens have UV absorbers. If you notice glare when you drive, use a specific pair kept in the car for driving .
• Lightest state – 60% tint.
• Darkest state – 91% tint.
• Blocks blinding glare.
• Polarization efficiency – 99%.
• 100% UV blockage.
• Reacts quickly to both UV and visible light.
• Activates moderately behind the windscreen.*
• Affordable photochromic polarization.•
*Degree of photochromic activation dependent on windscreen’s total light transmission and UV light absorption characteristics.
We have a large range of fashion,sports prescription and non prescription sunglasses and clip ons to suit your specific needs as well as lenses for kids.
Ultraviolet (UV) radiation is invisible energy produced by the sun. The UV radiation that reaches us is made up of UVA and UVB rays which are able to penetrate the skin and cause permanent damage and eye problems such as cataracts.
• UV A (320 – 400 nm) penetrates deeply into the skin causing damage to cells ,wrinkling, blotchiness
• UVB (290 – 320 nm) penetrates into the top layers of the skin/eye causing damage to the cells. UVB is responsible for sunburn – a significant risk factor for skin cancer, especially melanoma.
Ultraviolet light is present even when it’s not sunny,refecting off glass, water, the ground, and even off the back of your spectacle lens.
UV damage is cumulative and will build up over time without you knowing so is an important eye care issue.
Over time UV radiation can lead to eye health issues such as cataracts, pterygium and eye cancer. UV radiation can damage the delicate skin around your eyes causing premature aging and wrinkles
Anti reflection coatings can help transitions performance.Most lenses include anti reflection coatings.
Often the protection against UV label just makes reference to the blocking UV radiation property of the lens material itself.
Up to 50% of UV penetrating the eye though is reflected of the back surface so the E-SPF index takes into consideration the degree of UV protection, either by % transmited through the lens and % reflected off its back surface.
The Eye-Sun Protection Factor (E-SPF) is an index showing the overall UV protection provided by a lens. It is an objective rating system developed by Essilor International which can rate any lenses UV transmission and also importantly its back surface reflectance reduction.
The higher the E-SPF, the better the UV protection. Wearing a lens with an E-SPF value of 25 means that your eye is 25 times better protected than without a lens. (The E-SPF excludes direct eye exposure from around the lenses) so wrap is important.