Perscription transition glasses question...?!
Question: How long is it suppose to take for them to transition from dark to clear? My roommate just got a pair, and it takes his 5 minutes to transition. Seems a bit too long if you ask me.
Answers: How long is it suppose to take for them to transition from dark to clear? My roommate just got a pair, and it takes his 5 minutes to transition. Seems a bit too long if you ask me.
Did he actually buy Transitions? They are a brand, like Coca-Cola, they are the best on the market, but there are a lot of cheap imitations.
I know for a fact Specsavers do NOT sell Transitions, they have bought up all the old technology and sell it cheap, it is at least 5 years out of date so yes they will take ages to go dark, they'll also take ages to go light again. They probably won't go perfectly clear either.
If he did buy Transitions did he buy Transitions V (5)? They are the newest technology and go dark in about 1 minute and back to clear in about 2 minutes.
It sounds strange but put them in the freezer for a few minutes, it is UV that turns them dark but also cold temperatures will turn them dark too (in reverse they don't work their best in hot weather...) Sometimes it takes a few "transitions" to get them to start working properly. If they still don't go dark then ask the optician who sold them to him what product he sold.
sounds about right for mine,but,they seem to take longer when it's colder outside.mine also seem to take too long to adjust when i go into the sun.
It all depends on the prescription and weather.
Its never as quick as the ad shows on TV. About 2-5 minutes is about right. And actually, Transition 6 just came out in January. Some people may be using the older version, to use up stock, but the last version worked well too.
Some brands of photochromic lenses have a faster "fade-back" and some have a darker color outdoors. Some get more clear indoors.
Transitions is a brand--and not the only one out there. Ask your optician to choose for you based on what you want from from your lenses. I don't care to wear them myself--no brand is as clear or as fast-fading as the TV ads--as I don't have perfect vision.
Depends on air temp. The warmer the faster.
My eyes are so light sensitive that I couldn't get by with just the clear to dark kind. I had to have a slight tint added so when they went to dark it was "dark enough".
And I looked cool indoors too.
My recent pair are not Transitions and I've lost 2 sets of clip on shades and often find them not with me when I need them.
I'm ready to go back to Transitions.
Here's a good guide
http://www.allaboutvision.com/lenses/pho...
If the lenses are new, genuine Transitions, they should be pretty clear in about 1-2 minutes, but it might take up to about 5 minutes before they look completely clear. Read the Transitions materials here -- you'll find charts showing darkness as time passes: http://en-us.transitions.com/NR/rdonlyre...
The cool color-change effect is not the only reason to buy a photochromic lens. Just as your skin can become sunburned, your eyes can be damaged by UV too. Some types of cataracts have been linked to UV exposure. Maybe macular degeneration can be linked to chronic UV overexposure as well. You can get melanoma on your retinas. Read here: http://www.preventblindness.org/uv/uv.ht...
The real benefit of a (good) photochromic lens is that you are wearing a built-in "sunscreen" for your eyes all the time, to protect your vision. You don't have to remember to put on sunglasses or worry that your sunglasses that are just dark-tinted lenses that don't really screen out all the UV.
Like the others have said, Transitions is a brand. There are other photochromic lenses out there and they don't all perform the same. Some don't get as dark; some get dark but don't fade back as fast. If you buy genuine Transitions, I know that the UV protection is complete -- they block 100% of UVA and 100% of UVB rays, and the new Transitions VI also meets the Australia UV400 standard which is the toughest one of all. Some of the other brands might not be able to block 100%, or might only block 100% in the UVB range, but let some UVA pass through. So be careful to know what you're getting.
It's also correct that the temperature affects transition speed. The lenses transtion slower in hot weather. Part of the that is because the lenses get darker to begin with when it's cold, so they have farther to go until they look clear again. (Cold temperature alone doesn't make them go dark, you still need the UV.)
The prescription you wear does not affect how fast Transitions lenses will change. That might be true for other brands where the photochromic is cast into the lens. You might get a raccoon eye effect with some types of prescripesoin on these lenses. But the Transitions method makes a lens that looks the same no matter what your prescription.
The other thing about Transitions is that most of them don't work so well behind the wheel of a car. There is a new product called "Drivewear" that fixes this problem. The lenses aren't clear -- they're built for high contrast in driving conditions so there is some tint to them, but they do activate in the car.