I have a patient who got a pair of polarized grey 3 sunglasses with a backside AR. He found that they are not dark enough. Would a mirror help or what will the other options bee.
I have a patient who got a pair of polarized grey 3 sunglasses with a backside AR. He found that they are not dark enough. Would a mirror help or what will the other options bee.
Mirror would help the amount of light that reaches the eye decrease. Otherwise, tint them before applying the A/R.
I don't think a mirror coating will help with color density...do you have a transmission meter? Check the % if you do. If you're considering a mirror coating, why not just have your lab redo the job with the proper density...probably 85 grey will be dark enough.
What is he using them for. Glacier glasses (black out lenses) are much darker but there are legal issues that come with them, as they are too dark for driving. A mirror coating can make it more difficult to see the wearers eyes behind such lenses. I've never noticed any difference in the color value of a polarized non mirror vs a polarized mirrored lens.Originally Posted by EyeManDan
I didn't attend the funeral, but I sent a nice letter saying I approved of it. Mark Twain
Use Coppertone polarized grey with mirror and backside A/R. They will be dark enough!
Sure and have them delaminate within the next few months. Not a stellar suggestion.
Been tinting polarized for years and not had that problem myself...
You've experienced a polarization layer delaminate by tinting and AR coating the back of a lens?
Never seen that happen due to tinting.
Right. If not high altitude sun and snow, look for pathology that would cause unusual light and glare sensitivity.
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
Sometimes the pathology is in their head!
I think flash mirror is great on polarized for a couple of reasons:
1. May add about 5% on light reduction.
2. Looks cool.
3. Patients can't "see their eyes" and tell you "they're not dark enough". Man, oh man.
I've been very light sensitive since I was a kid. I'm comfortable around water and snow with my AR coated (both sides) brown #3 polarized sunglasses. I suspect there's something else going on, maybe a poor light seal and/or poor eye health. Maybe, as you say, the client needs a little education, an explanation as to how things work. My next stop will be to check on the lunar phase.
Dan,
How do the sunglasses compare to the old sunglasses? Please supply the Rx, client age, and pertinent medical history.
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
I second Coppertone grey. Darker than the average polarized lens.
~ Erin
ABOC
I second this.I suspect there's something else going on, maybe a poor light seal
RT
I will let you know, Patient Is 50, has some medical issues and a list of medications. So their are outside factors to his need. I did do a blue mirror with a polarized 3 grey tinted to 80%. have not received them as of yet.
Some medications can increase or cause light sensitivity. Make sure the doctor is involved.
Brown tints can reduce photophobia better than grey tints- demo with polarized fitovers.
Science is a way of trying not to fool yourself. - Richard P. Feynman
Experience is the hardest teacher. She gives the test before the lesson.
Polarized lenses can be tinted, but you have to order then Unhardcoated, and I recommend tinting before edging, and we have had better luck with the Nupolar lenses because the sandwich is thicker, over other brands where the polarization is on the top surface. Temps have to watched closely.
Even then we do peal a few, but we run our tints toward the high end. So if you can turn your tint temps down a hair.
Please only add "advice" if it is correct and pertains to the topic.
There are currently 1 users browsing this thread. (0 members and 1 guests)
Posting Permissions
Reply With Quote
Bookmarks