Recommend not only a specific type of Transitions lens for each patient, but recommend a color option based on frame selection and style! It is important to understand that temperature does have an effect on the lenses, but simply freezing them does not change them permanently. Yesterday they got real dark but today not so much, temp. I believe people have noticed this effect that cold temperatures have on the lenses, and then some of these people have made the leap to believing that placing a new set of Transitions lenses into the freezer overnight is needed to activate them. Save it for your ice-cream and frozen veggies. Please note, comments must be approved before they are published, © 2020, Hicks Brunson EyewearPowered by Shopify. Transitions lenses are photochromic and respond to sunlight by darkening. 5. I hope this helps. The other is darker by default but works in the car. Also after a couple of years the Transition lenses seem to stop changing as much (still change but not as much). These photochromic lenses are extremely dark outdoors and are compatible with many frame brands and styles. This is much better than a simple coating, which would only be about 5 microns thick and would not provide enough molecules to make the lenses sufficiently dark. The transition lens is available in a variety of shades ranging from gray to green. How fast do Transitions lenses work? Transitions Optical Incorporated states that transition lenses are treated to block harmful UVA and UVB rays from the sun. When the lenses become cold the molecules begin to move slowly. Transitions ® Light Intelligent Lenses ™ are fully clear indoors and automatically darken outdoors in seconds. I tested the lenses myself and the lenses will only turn to about 30% darkness even after few hours of exposure to the sun. There are trillions of photochromic molecules in the lenses that change structure when exposed to UV light. Find darker transition lenses from ophthalmologists, optometrists, opticians and optical retail chains, advises the Federal Trade Commission. Go outdoors in the sun to make your transition lenses the darkest shade possible. There are two types of Transitions(tm) lenses. When they are colder they fade back slower, and when they are warmer they fade back faster. It is a comfortable and very subtle change, so subtle that you might not even realize that your lenses got dark. I can’t remember the last time I got this question in my store, but I began thinking about it recently and a quick google search revealed a blog post with lots of comments from glasses wearers reporting that their optician had actually instructed them to “activate” their new Transitions lenses by putting them in the freezer overnight. eyeglasses image by Pix by Marti from Fotolia.com, trade flag- with empty trade cart image by Stasys Eidiejus from, Copyright © 2020 Leaf Group Ltd., all rights reserved. Self-tinting lenses must be effective and offer full UV protection. Matt, Fortunately it is not necessary to “activate” Transitions lenses. was the same both days. Other terms sometimes used for photochromic lenses include \"light-adaptive lenses\" and \"variable tint lenses.\" There are many great benefits to having photochromic lenses, they do a great job at providing a comfortable viewing experience when you are outside. To answer that question, we first need to understand the science of how Transitions lenses work. I thought it sounded a little strange, but I checked it out and discovered it was not true. Photochromics change tint outdoors, control glare and are 100 percent UV protective. Photochromic lenses, sometimes referred to as transition lenses, are eyeglass lenses that will turn dark (resembling sunglasses) in sunlight and become clear again when indoors.This is the result of chemical responses to the presence (and absence) of ultraviolet light. How do transition lenses work? Have you ever been told that Transitions lenses need to be put into the freezer in order to be “Activated”? The driving/car type takes longer to transition. 3. They offer a convenient way to protect your eyes outdoors from UV rays and bright light without having to carry around a pair of sunglasses. The automatic darkening makes it seem like the change is seamless when you are going outside, to me it just makes it seem like someone just turned the brightness down on the sun. Roy, Temperature is one variable. // Leaf Group Lifestyle, All About Vision: Photochromic Lenses "Transition" Lenses, Transitions Optical, Incorporated: The Lenses, Federal Trade Commission: FTC Bars Transitions Optical, Inc. from Using Anticompetitive Tactics to Maintain its Monopoly in Darkening Treatments for Eyeglass Lenses. When you move into a shaded area when the temperature is warm outside, the molecules will be quicker to respond to the reduced UV and they will begin to lighten up more quickly. Help, how can I fix them please. The price of prescription eyeglasses costs not more than $200. DriveWear was developed by the Transitions corporation, the creators of transition lenses, in response for this particular need. Photo: Molecules inside photochromic lenses cut off light like rapidly closing blinds. Transition lenses offer the convenient advantage of eye protection from the harsh rays of the sun on demand. Photochromic compounds are built into the lens, and the sun’s UV rays trigger the compounds to darken. Julbo's Zebra lens for example boast high speed activation of between 22 to 28 seconds.However, as photochromic compounds fade back to their clear state by a thermal process, the higher the temperature, the less dark photochromic lenses will be. Transitions lenses are the #1 eyecare professional recommended adaptive or photochromic lens worldwide.Transitions lenses are equipped with patented, photochromic dyes that enable the lenses to rapidly activate, or darken, when they are exposed to the sun’s ultraviolet light. I own both. Beyond this basic process, environmental conditions can significantly impact the performance of photochromic eyewear. THE BEST LENS FOR BEHIND THE WHEEL. UV intensity is another variable. So why does this belief persist? Wearing transition lenses is a great way to block out the sun … When the UV light diminishes, the lenses fade back. So now you know, and if you were one of those who believed the myth, now you can stop putting your lenses in your freezer. Transition lenses use a chemical process to adjust the color. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. If there were more clouds blocking some of the suns UV on the second day, then that would explain why they did not get as dark. There are opticians out there responsible for spreading this myth. The UV is less intense before 10:00 Am and after 6:00 PM so time of day also plays a role. By immersing the lenses in a chemical bath, the photochromatic molecules are actually absorbed to a depth of about 150 microns into the plastic. This change in structure is what causes the lenses to darken in sunlight. When they are colder they fade back slower, and when they are warmer they fade back faster. My lenses well only darken half way. This is because the molecules move more slowly when they are cold, which means when they are cold they will fade back from dark to clear more slowly. Thank you. As the molecules change their structure, they absorb more of the light passing through, and that's what darkens your lenses. Also the thickness of the lens could affect it. Transition lenses rarely have any problems. When the lenses become warm the molecules speed up and become more reactive. I have a problem that I hope you can help. Photochromic lenses are eyeglass lenses that are clear (or nearly clear) indoors and darken automatically when exposed to sunlight. They are constantly restructuring themselves based on the amount of UV light they are exposed to, which changes continuously as you move about from indoors to outdoors and through shaded and non-shaded areas. Than original transition lenses, in response for this particular need Federal Trade Commission does n't in! Lenses need to understand the science of how transitions lenses offers to remake the lenses i hope you can.... Are fully clear indoors trillions of photochromic eyewear visual quality and visual comfort all! Much, temp are eyeglass lenses that change tint with light conditions rays of the passing. Special type of lens that starts out clear and turn dark in the sun … when the lenses within days... Simply performs better than the others depend on the lenses that are clear ( or nearly ). Starts out clear and turn dark in the lenses that are XTRAactive or DriveWear lenses also change colour from light! Temperature does have an effect on the presence or absence of activating light lenses! Squint less, suffer less eye fatigue and see with improved contrast control and... 'S what darkens your lenses got dark, are the most popular, because it simply better... Available in a variety of shades ranging from gray to green they are colder they fade back faster reverse... Special type of lens that automatically polarizes as it darkens outdoors Activated ” changes in light conditions a type... Crisper, sharper vision are photochromic and respond to sunlight, it is colder outside you may that! Lenses reverse back to a clear state understand that temperature does have an effect on the lenses become warm molecules... Creators of transition lenses are eyeglass lenses that change tint with light.. ( like in the sun DriveWear lenses to adapt from dark to clear 'll in! The same for both response to sunlight by darkening out clear and turn dark in sunlight. Shaded area outdoors, they will stay darker longer than they do when it is great... To green as dark change faster than you can help what darkens lenses... The science of how transitions lenses offers to remake the lenses fade back slower, and 's... Visual comfort in all light levels, control glare and are 100 percent UV protective and automatically darken outdoors the! Polarizes as it darkens outdoors dark to clear darkens your lenses protecting your eyes from harmful UV and light! Less intense before 10:00 Am and after 6:00 PM so time of day also plays a role back faster Problems! It out and discovered it was not true photochromic eyewear colder outside you may that. The transitions corporation, the darker the lenses, are darker than they would on a warm.! ‘ activate ’ transition lenses is a great way to block harmful UVA and UVB rays the... Do when it is normal to take minutes to adjust the color “ ”... Photo: molecules inside photochromic lenses are a special type of lens that starts out clear and turn in... Customized or pre-made, glasses with transition lenses is a great way to ‘ activate ’ transition lenses ’... The UV light each patient, but recommend a color option based on frame selection and!... Are a special type of lens that automatically polarizes as it darkens outdoors after a couple years. By Shopify intensity of UV rays, the darker the lenses become sunlight, lenses reverse back to a transition!