How often do you do this? Is it a good idea? Is there an issue for you with quality?
How often do you do this? Is it a good idea? Is there an issue for you with quality?
99.99% of the time. No issues. I see more(but still very infrequent) issues with the factory front side hard coat than the backside AR.
What Kwill said.
I bend light. That is what I do.
We need to do more.
Do you do it on sport-style wrap frames, or more fashion and general purpose frames?
How about polar poly?
Yes.
Yes.
Is that the stuff I scraped off my shoe this morning that smelled terrible? I thought it was dog crap...
90%+ of the suns I do are polarized. 1% of those are poly and only for cutout/blank size in a huge sport frame or something like that. They all still get backside AR.
Be nice to polycarb. It's not polycrap.
All suns should have AR IMHO. If not, your not doing your best for your pt.
Yes backside AR EVERY sun! Spinning off from our discussion about tinting and AR drk, I rarely tint and always go for polarized (poly all the time, I have few issues). And on polarized Xperio is amazing: you get the frontside TD2 dip hardcoating, and Alize backside. And the price is excellent.
Even if you're not doing premium lenses/AR, I would recommend even a cheap backside AR. Most labs have a pretty inexpensive basic AR that will still do a good job of reducing that backside lens reflection.
- Mindy
+1
I just can't not do AR backside! I ALWAYS recommend it. The only exception would be something where the frame is more like a goggle and no light can come in from behind , maybe then you can get away without it (think Liberty DE cup frames). That's pretty rare though. Myself... went cheap one time and skipped it. Drove me up a wall and I can never ever again have a sun without AR backside.
Last edited by mervinek; 09-09-2022 at 09:46 AM. Reason: typo
We were just discussing this in office! I always do a backside AR, whether polarized (99.4%) as well as the infrequent tinted only lens.
I've heard a school of thought that you shouldn't backside AR tint only lenses. Does anyone want to give me thoughts on this?
Referring to backside AR on suns
https://www.optiboard.com/forums/sho...light=backside
I respect the hell out of his opinion, does anyone know where that opinion is coming from?
Same place this opinion came from?
As far as I can tell Chris thought everyone should be wearing FT35s with no AR probably in glass. Everything else was the result of greedy opticians. Unless of course it was a product he produced and sold. Chris may have invented or patented his niche items of the optical trade, coatings, tints, etc. and had his heyday during the Tillyer Masterpiece era. But I don't think he kept up, or wanted to keep up, with the rapidly changing landscape and technology of ophthalmic dispensing.
It was someone else in the optical industry. Definitely not a fortune cookie. :) I always Backside AR because it's my understanding that light can hit the back of the lens and enter the eye. Also from a practical standpoint, I can't stand the reflection myself! Just was curious if anyone else had heard not to and what the science might be behind that opinion.
This is a good question. What makes backside reflections worse with sunglasses than indoor glasses?
I have my theory. What's yours?
I too think it's #2, too. Et tu?
Draw on a tinted piece of glass with white paint and observe the contrast between dark and light.
Draw on a clear piece of glass with white paint and observe the contrast between dark and light.
Both are obstructive to clear observation through the glass. One is far more obvious to the eye.
So, you're saying a light image on a dark background has higher contrast than a light image on a clear background.
I'll buy it!
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