Photochromatic for the Car?

**EdSheridan** · 08-21-2006, 09:30 AM

I remember reading somewhere....then a customer called and asked for....a new plastic photochromatic lens that works without UV light....Driver?

Anyone know who's selling this?

Thanks,
Ed

**unwanted prism** · 08-21-2006, 09:48 AM

No, haven't heard of it. I couldn't see how it would work. If it reacts to the visible light as oppose to the uv light it would be getting dark inside with artificial light. I've had seberal patients say their "old" photochromatics get dark in the car. after investigation it's typically an older lens that's not changing as well anymore and is somewhat dark in it's clear state

**Jacqui** · 08-21-2006, 09:51 AM

Check with Younger, they make one.

RT · 08-21-2006, 10:27 AM

Check this previous thread to learn some more about Younger Drivewear.

http://www.optiboard.com/forums/showthread.php?t=18039

**For-Life** · 08-21-2006, 10:34 AM

Originally Posted by unwanted prism

No, haven't heard of it. I couldn't see how it would work. If it reacts to the visible light as oppose to the uv light it would be getting dark inside with artificial light. I've had seberal patients say their "old" photochromatics get dark in the car. after investigation it's typically an older lens that's not changing as well anymore and is somewhat dark in it's clear state

and many older model cars did not have UV blocking

**Chris Ryser** · 08-21-2006, 11:10 AM

Originally Posted by For-Life

and many older model cars did not have UV blocking

Forgive me for correcting, .............all cars have glass windows..............older ones and younger ones. Glass does and always has been absorbing UV.

**mike.elmes** · 08-21-2006, 11:58 AM

Originally Posted by EdSheridan

I remember reading somewhere....then a customer called and asked for....a new plastic photochromatic lens that works without UV light....Driver?

Anyone know who's selling this?

Thanks,
Ed

just noticed you wanted plastic....

**loncoa** · 08-21-2006, 12:31 PM

Yes, all cars had glass. Yes all glass blocked some UV. Has auto glass always blocked the same amount of UV as it does now? No.

**EdSheridan** · 08-21-2006, 03:20 PM

Thanks everyone,
The Younger product was the one I was thinking of.

**CEO** · 08-21-2006, 11:49 PM

Yes, DriveWear is a new product being released by YoungerOptics September 1. It does indeed use both UV light and visible light, and is at all times an efficient polarizer, even with it's fairly light yellow/green unactivated starting state.

For more information I invite everyone to visit the web site at:

www.Drivewearlens.com

Also, I will be happy to answer any questions or hear comments to me via e-mail to me or through OptiBoard.

I believe this lens to be the most innovative lens introduced to this industry in many years, however I must admit I'm prejudiced.

Everyone, have a look and let me know what you think.

Dave

**CEO** · 08-21-2006, 11:54 PM

By the way, a good point was made about the glass on windshields and it is interesting to note that there is no standard amount of UV which is absorbed in windshields. They don't all absorbed equally, in fact we found some which tend to absorb more, and others less. For example, the new Toyota's appear to be on the more side.

Just a small piece of trivia the you probably wish you never heard................

**edKENdance** · 08-22-2006, 12:36 AM

This sounds totally awesome Dave. I wish you all the best with it. It's about time for something new eh?

**Chris Ryser** · 08-22-2006, 04:20 AM

Originally Posted by CEO

Yes, DriveWear is a new product being released by YoungerOptics September 1. It does indeed use both UV light and visible light,
www.Drivewearlens.com

Dave, I have a question. The new lens will activate with UV and visible light...............how will it behave in a well lit building or your own home or office?

I have listed your above website on my 556 website listing at http://optochemicals.com/web_ratings.htm

**Ory** · 08-22-2006, 07:52 AM

Does this mean I won't be able to see my midnight snack because the fridge light tints my lenses?

**CEO** · 08-22-2006, 08:06 PM

Chris: your question is a good one. DriveWear will react to lights inside a room depending upon the intensity of the light and the spectral characteristics of that light. The effect probably won't be very visible because the polarizer reduces the transmission to about 37% so, you probably won't lose more than a couple of points of transmission off of this.

Behind the windshield of the car with bright light hitting it, here the visible light could reduce DriveWear to about 25% transmission. So you can see, it reacts a lot more to bright light from the sun than it would typically just from indoor light.

Clearly, DriveWear is still a sunwear lens designed for driving in overcast, and bright conditions, and as a sunwear lens, certainly not as an indoor lens.

**hotsauce** · 08-22-2006, 08:11 PM

I think that this lens is intended to be a sunglass-only proposition, not an everyday all-the-time lens. I know I certainly wouldn't wear something all day that, at its lightest, looks to me like about a 30% gray-green tint.