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Hello:

Can anyone tell me anything about the TD2 Essilor lens scratch resistant coatings.

Worth an additional $ 40.00 ?
How can one be sure it's actually been applied?

Better ones...

Hello:

I had a new pair of prescription polarized sunglasses made. As suggested, I specified that the lenses come from Younger. I am happy with them, other than some stress bi-refringences...

Hello:

What can anyone tell me regarding the "scratch resistant" coatings applied to Pastic lenses?

Is this usually a silicon dioxide thin film coating, or a "dip" of some kind?

Do...

Hello:

Am wondering if anyone has any opinions or other thoughts regarding the Colormax lenses being marketed to help those with colorblindness.

They've been available now for a while, and I...

Hello:

I have 2 boxes from Younger for two pair of Sunglasses I just had made with their NuPolar lenses. Want to be sure that I have what I actually ordered, and desire.

One box has SU NuPolar...

Hello:

I'm a retired optical engineer, but am still having a hard time obtaining information on the following. If anyone has a spare few minutes, would be most appreciative for any wisdom on the...